348 results match your criteria A-Scan Biometry


Accuracy of swept-source optical coherence tomography based biometry for intraocular lens power calculation: a retrospective cross-sectional study.

BMC Ophthalmol 2019 Jan 24;19(1):30. Epub 2019 Jan 24.

Catholic Institute for Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.

Background: To evaluate the accuracy of biometric measurements by a swept-source optical coherence tomography (SS-OCT) based biometry for intraocular lens (IOL) power calculation.

Methods: This retrospective observational study enrolled 431 patients undergoing cataract surgery. The charts were reviewed to investigate the failure rate of axial length (AL) measurement of the SS-OCT biometer, partial coherence interferometry (PCI), and A-scan ultrasonography (US) according to cataract type and severity. Read More

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http://dx.doi.org/10.1186/s12886-019-1036-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6346505PMC
January 2019
2 Reads

The Association Between Retinopathy of Prematurity and Ocular Growth.

Invest Ophthalmol Vis Sci 2019 Jan;60(1):98-106

Department of Ophthalmology, Medical School, University of Thessaly, Larissa, Greece.

Purpose: The purpose of this study was to prospectively investigate the association between retinopathy of prematurity (ROP) and ocular growth in premature infants during the earliest weeks of life.

Methods: Premature infants in the national ROP screening program were recruited and examined at 1- or 2-week intervals between 30 and 38 weeks of postmenstrual age. One hundred infants with gestational age (GA) between 24 and 35 weeks (30. Read More

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http://dx.doi.org/10.1167/iovs.18-24776DOI Listing
January 2019

Comparison of Ocular Biometry Using New Swept-source Optical Coherence Tomography-based Optical Biometer with Other Devices.

Korean J Ophthalmol 2018 08;32(4):257-264

Department of Ophthalmology, HanGil Eye Hospital, Incheon, Korea.

Purpose: To evaluate the agreement between optical biometry with swept-source optical coherence tomography-based optical biometry (IOLMaster 700) and other devices.

Methods: A total of 137 eyes (78 patients) with cataracts were included in this retrospective study. Axial length (AL), anterior chamber depth (ACD), keratometry, and white-to-white (WTW) distance measured using IOLMaster 700 were compared with results for the following five different biometers: IOLMaster 500, A-scan, automated refractor, manual keratometry, and Galilei G4. Read More

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http://dx.doi.org/10.3341/kjo.2017.0091DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6085186PMC
August 2018
1 Read

Classification of primary angle closure spectrum with hierarchical cluster analysis.

PLoS One 2018 23;13(7):e0199157. Epub 2018 Jul 23.

Hamilton Glaucoma Center, Department of Ophthalmology, Shiley Eye Institute, University of California-San Diego, La Jolla, California, United States of America.

Purpose: To classify subjects with primary angle closure into clusters based on features from anterior segment optical coherence tomography (ASOCT) imaging and to explore how these clusters correspond to disease subtypes, including primary angle closure suspect (PACS), primary angle closure glaucoma(PACG), acute primary angle closure (APAC) and fellow eyes of APAC and reveal the factors that become more predominant in each subtype of angle closure.

Method: A cross-sectional study of 248 eyes of 198 subjects(88 PACS eyes, 53 PACG eyes, 54 APAC eyes and 53 fellow eyes of APAC) that underwent complete examination including gonioscopy, A-scan biometry, and ASOCT. An agglomerative hierarchical clustering method was used to classify eyes based on ASOCT parameters. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0199157PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6056027PMC
December 2018
2 Reads

Accuracy of axial length measurements obtained by optical biometry and acoustic biometry in rhegmatogenous retinal detachment: a prospective study.

Clin Ophthalmol 2018 23;12:973-980. Epub 2018 May 23.

Vitreoretinal Research Unit, Department of Ophthalmology, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand.

Purpose: We compared the accuracy of axial length (AL) measurement obtained by optical biometry with that obtained by acoustic biometry in eyes with rhegmatogenous retinal detachment (RRD).

Patients And Methods: This prospective descriptive analytic study measured the AL of eyes with RRD preoperatively and 3 months postoperatively using optical biometry (intraocular lens [IOL] master group) and acoustic biometry (immersion A-scan group). Preoperative and postoperative measurements were compared by paired -test. Read More

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http://dx.doi.org/10.2147/OPTH.S165875DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5973443PMC
May 2018
3 Reads

M to L cone ratios determine eye sizes and baseline refractions in chickens.

Exp Eye Res 2018 07 30;172:104-111. Epub 2018 Mar 30.

Section of Neurobiology of the Eye, Ophthalmic Research Institute, University of Tuebingen, Elfriede Aulhorn Strasse 7, 72076, Tuebingen, Germany. Electronic address:

Following a hypothesis raised by M. and J. Neitz, Seattle, we have tested whether the abundance and the ratio of Long wavelength-sensitive (L) to Middle wavelength-sensitive (M) cones may affect eye size and development of myopia in the chicken. Read More

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http://dx.doi.org/10.1016/j.exer.2018.03.029DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6013296PMC
July 2018
2 Reads

Glaucoma With Crouzon Syndrome.

J Glaucoma 2018 Jun;27(6):e110-e112

King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.

Background: Crouzon syndrome is the most common form of craniosynostosis, and mutations in the fibroblast growth factor receptor 2 and 3 (FGFR2 and FGFR3) genes are implicated in its pathogenesis.

Observation: A 10-year-old female patient with Crouzon syndrome and congenital glaucoma treated with trabeculectomy and ocular hypotensive medications was examined. The patient had proptosis, exposure keratopathy, megalocornea, thin central corneal thickness, a shallow anterior chamber, mild anterior subcapsular cataract, and a cup-to-disc ratio of 0. Read More

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http://Insights.ovid.com/crossref?an=00061198-900000000-9847
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http://dx.doi.org/10.1097/IJG.0000000000000946DOI Listing
June 2018
22 Reads

Comparison of peripapillary retinal nerve fiber layer thickness between myopia severity groups and controls.

Int J Ophthalmol 2018 18;11(2):274-278. Epub 2018 Feb 18.

Department of Ophthalmology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia.

Aim: To compare the peripapillary retinal nerve fiber layer (RNFL) thickness measured optical coherence tomography (OCT) between different groups of myopia severity and controls.

Methods: This was a prospective cross-sectional study. All subjects underwent a full ophthalmic examination, refraction, visual field analysis and A-scan biometry. Read More

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http://dx.doi.org/10.18240/ijo.2018.02.16DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5824084PMC
February 2018
3 Reads

Ocular Biometry in Primary Angle-Closure Glaucoma Associated with Retinitis Pigmentosa.

J Ophthalmol 2017 31;2017:9164846. Epub 2017 Dec 31.

State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.

Background: Retinitis pigmentosa (RP) comprises a group of inherited disorders in which patients typically lose night vision in adolescence and then lose peripheral vision in young adulthood before eventually losing central vision later in life. A retrospective case-control study was performed to evaluate differences in ocular biometric parameters in primary angle-closure glaucoma (PACG) patients with and without concomitant RP to determine whether a relationship exists between PACG and RP.

Methods: We used ultrasound biomicroscopy (UBM) to measure anterior chamber depth (ACD). Read More

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http://dx.doi.org/10.1155/2017/9164846DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5804412PMC
December 2017
6 Reads

How close are we? An audit of biometry of a tertiary care hospital in Karachi.

J Pak Med Assoc 2018 Jan;68(1):81-84

Liaquat National Hospital, Karachi.

Objective: To evaluate the accuracy of biometry in the post-op phase of cataract surgery.

Methods: This study was conducted at Liaquat National Hospital, Karachi, from June 2015 to July 2016, and comprised the audit of patients who underwent cataract surgery during the period. Keratometry was done on Haag-Strait manual keratometer and A-scan was done by applanation contact method on SonoMed machine. Read More

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January 2018
3 Reads
0.403 Impact Factor

Axial Length and Ocular Development of Premature Infants without ROP.

J Ophthalmol 2017 15;2017:6823965. Epub 2017 Oct 15.

The 2nd Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, 109 Xueyuan Road, Wenzhou, Zhejiang 325027, China.

Purpose: To investigate the ocular parameters of premature infants without ROP at gestational age (GA) more than 28 weeks and their relationship with growth parameters.

Methods: 76 preterm infants without ROP and 65 term infants were involved to undergo portable slit lamp, RetCam3, ultrasonic A-scan biometry, and cycloplegic streak examination at their 40 weeks' postconceptional ages (PCA). Ocular parameters of infants' right eye and growth parameters were used for analysis. Read More

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http://dx.doi.org/10.1155/2017/6823965DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5661099PMC
October 2017
7 Reads

Anterior Segment Morphology in Primary Angle Closure Glaucoma using Ultrasound Biomicroscopy.

J Curr Glaucoma Pract 2017 Sep-Dec;11(3):86-91. Epub 2017 Oct 27.

Director Clinical Research, Department of Biostatistics, National Institute of Nutrition Hyderabad, Telangana, India.

Aim: To evaluate the configuration of the anterior chamber angle quantitatively and study the morphological changes in the eye with ultrasound biomicroscopy (UBM) in primary angle closure glaucoma (PACG) patients after laser peripheral iridotomy (LPI).

Materials And Methods: A total of 185 eyes of 185 PACG patients post-LPI and 126 eyes of 126 normal subjects were included in this prospective study. All subjects underwent complete ophthalmic evaluation, A-scan biometry, and UBM. Read More

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http://dx.doi.org/10.5005/jp-journals-10028-1230DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5684238PMC
October 2017
10 Reads

Morphometric assessment of normal human ciliary body using ultrasound biomicroscopy.

Graefes Arch Clin Exp Ophthalmol 2017 Dec 3;255(12):2437-2442. Epub 2017 Oct 3.

Department of Ophthalmology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8575, Japan.

Purpose: To quantitatively assess the biometry of the ciliary body in normal human eyes using ultrasound biomicroscopy.

Methods: We evaluated 85 eyes of 85 normal subjects (35 men and 50 women), whose age ranged from 11 to 86 years (mean ± SD, 56.8 ± 20. Read More

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http://dx.doi.org/10.1007/s00417-017-3809-4DOI Listing
December 2017
1 Read

Intraocular pressure change after phacoemulsification in angle-closure eyes without medical therapy.

J Cataract Refract Surg 2017 Jun;43(6):767-773

From the Singapore Eye Research Institute (Atalay, Nongpiur, Baskaran, Perera, Wong, Aung), the Duke-NUS Graduate Medical School (Nongpiur, Baskaran, Wong), the Yong Loo Lin School of Medicine (Aung), National University of Singapore, and the Singapore National Eye Centre (Perera, Wong, Quek, Aung), Singapore, Singapore. Electronic address:

Purpose: To evaluate the intraocular pressure (IOP) change and associated factors 6 months after phacoemulsification in eyes with primary angle-closure suspect (PACS) and eyes with primary angle closure (PAC) that had no medical therapy.

Setting: Singapore National Eye Center, Singapore, Singapore.

Design: Retrospective case series. Read More

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http://dx.doi.org/10.1016/j.jcrs.2017.03.031DOI Listing
June 2017
16 Reads

The chromosome analysis of the miscarriage tissue. Miscarried embryo/fetal crown rump length (CRL) measurement: A practical use.

PLoS One 2017 12;12(6):e0178113. Epub 2017 Jun 12.

Institute of Genomic Medicine, Università Cattolica Del Sacro Cuore, Fondazione Policlinico A. Gemelli, Rome, Italy.

Objective: To investigate whether miscarried embryo/fetal crown rump length (CRL) measurement may yield a practical application for predicting a conclusive result at the cytogenetic analysis of miscarriage tissue. Our study might help in improving the cytogenetic method, the results of which may be affected by maternal cell contamination (MCC). In particular, we aimed at establishing whether the miscarried embryo/fetal CRL measurement shows accuracy in predicting the possibility of MCC and the scan cut-off value useful to this purpose and, as a result, suggest a multi-step procedure for the genetic ascertainment. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0178113PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5467807PMC
September 2017
11 Reads

A Prospective Study of Anterior Segment Ocular Parameters in Anisometropia.

Korean J Ophthalmol 2017 Apr 21;31(2):165-171. Epub 2017 Mar 21.

Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.

Purpose: The aim of this study was to investigate the differences in anterior segment ocular parameters in anisometropia >1 D.

Methods: This study included 202 eyes of 101 subjects ranging from 10 to 40 years of age with anisometropia of 1 D or more. The subjects were divided into groups according to anisomyopia, anisoastigmatism, and anisohypermetropia. Read More

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http://dx.doi.org/10.3341/kjo.2017.31.2.165DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5368091PMC
April 2017
8 Reads

Comparison of biometry and intraocular lens power calculation performed by a new optical biometry device and a reference biometer.

J Cataract Refract Surg 2017 Jan;43(1):74-79

From the Cullen Eye Institute (B.V. Ventura, Wang, Koch, Weikert), Department of Ophthalmology, Baylor College of Medicine, Houston, Texas, USA; Altino Ventura Foundation (B.V. Ventura, M.C. Ventura), HOPE Eye Hospital (B.V. Ventura, M.C. Ventura), Recife, and the Department of Ophthalmology (B.V. Ventura), Federal University of São Paulo, São Paulo, Brazil.

Purpose: To compare biometry measurements and intraocular lens (IOL) power calculations obtained by a new optical A-scan interferometer biometer (Galilei G6) (new biometer) and a partial coherence interferometer biometer (IOLMaster 500) (reference biometer).

Setting: Private practice, Recife, Brazil.

Design: Retrospective comparative study. Read More

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http://dx.doi.org/10.1016/j.jcrs.2016.11.033DOI Listing
January 2017
4 Reads

Retina and Optic Disc Characteristics in Amblyopic and Non-amblyopic Eyes of Patients with Myopic or Hyperopic Anisometropia.

Turk J Ophthalmol 2017 Jan 17;47(1):28-33. Epub 2017 Jan 17.

Çanakkale Onsekiz Mart University Faculty of Medicine, Department of Ophthalmology, Çanakkale, Turkey.

Objectives: To compare retinal and optic disc characteristics between amblyopic and non-amblyopic eyes in patients with myopic and hyperopic anisometropia measured with optical coherence tomography (OCT).

Materials And Methods: Patients with myopic (25 patients: 17 female, 8 male; median age 27 years, range 16-40 years) and hyperopic (31 patients: 19 female, 12 male; median age 20 years, range 13-41 years) anisometropic amblyopia were included. Eye examination included determination of best-corrected visual acuity (BCVA) with a Snellen chart, measurement of manifest and cycloplegic refraction after pupillary dilation, alternate cover testing, globe movement evaluation, A-scan biometry for axial length, biomicroscopy, fundus examination, and OCT scanning. Read More

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http://dx.doi.org/10.4274/tjo.54289DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5282538PMC
January 2017
3 Reads

Active Brown Fat During F-FDG PET/CT Imaging Defines a Patient Group with Characteristic Traits and an Increased Probability of Brown Fat Redetection.

J Nucl Med 2017 07 19;58(7):1104-1110. Epub 2017 Jan 19.

Molecular Nutritional Medicine, ZIEL-Institute for Food & Health, Technical University of Munich, Freising, Germany; and.

Brown adipose tissue (BAT) provides a means of nonshivering thermogenesis. In humans, active BAT can be visualized by F-FDG uptake as detected by PET combined with CT. The retrospective analysis of clinical scans is a valuable source to identify anthropometric parameters that influence BAT mass and activity and thus the potential efficacy of envisioned drugs targeting this tissue to treat metabolic disease. Read More

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http://jnm.snmjournals.org/lookup/doi/10.2967/jnumed.116.183
Publisher Site
http://dx.doi.org/10.2967/jnumed.116.183988DOI Listing
July 2017
9 Reads

Quantitative in vivo assessment of bone microarchitecture in the human knee using HR-pQCT.

Bone 2017 04 27;97:43-48. Epub 2016 Dec 27.

Department of Radiology, Cumming School of Medicine, University of Calgary, Canada; McCaig Institute for Bone and Joint Health, University of Calgary, Canada. Electronic address:

Objective: High-resolution peripheral quantitative computed tomography (HR-pQCT) is a novel imaging modality capable of visualizing bone microarchitecture in vivo at human peripheral sites such as the distal radius and distal tibia. This research has extended the technology to provide a non-invasive assessment of bone microarchitecture at the human knee by establishing new hardware, imaging protocols and data analysis.

Design: A custom leg holder was developed to stabilize a human knee centrally within a second generation HR-pQCT field of view. Read More

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http://dx.doi.org/10.1016/j.bone.2016.12.015DOI Listing
April 2017
7 Reads

Comparision of Optical Low Coherence Reflectometry Versus Ultrasonic Biometry in High Hypermetropia.

Eye Contact Lens 2018 Sep;44 Suppl 1:S115-S117

Department of Ophthalmology (R.A., S.K.E.), Istanbul Medipol University, Istanbul, Turkey; Department of Ophthalmology (K.S.C.), Istanbul Bagcilar Training and Research Hospital, Istanbul, Turkey; Department of Ophthalmology (E.K.), Bati Göz Hospital, Izmir, Turkey; and Department of Ophthalmology (S.K.), Dokuz Eylul University, Izmir, Turkey.

Purpose: To compare anterior chamber depth (ACD), axial length (AL), and lens thickness (LT) measurements obtained by the Lenstar LS 900 (Haag-Streit AG) optical low-coherence reflectometry with those obtained by the A-scan contact ultrasound among patients with moderate and high hypermetropia.

Methods: Fifty-two eyes of 52 patients with moderate and high hypermetropia (spherical equivalent of +4 D or more) were examined in this study measurements of ACD, AL, and LT obtained by Lenstar were compared with those obtained by applanation A-scan ultrasound. All measurements were obtained by two independent examiners. Read More

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http://dx.doi.org/10.1097/ICL.0000000000000350DOI Listing
September 2018
4 Reads

Qualitative evaluation of anterior segment in angle closure disease using anterior segment optical coherence tomography.

J Curr Ophthalmol 2016 Dec 12;28(4):170-175. Epub 2016 Jul 12.

Koret Vision Center, University of California, San Francisco Medical School, San Francisco, CA, USA.

Purpose: To evaluate different mechanisms of primary angle closure (PAC) and to quantify anterior chamber (AC) parameters in different subtypes of angle closure disease using anterior segment optical coherence tomography (AS-OCT).

Methods: In this prospective study, 115 eyes of 115 patients with angle closure disease were included and categorized into three groups: 1) fellow eyes of acute angle closure (AAC; 40 eyes); 2) primary angle closure glaucoma (PACG; 39 eyes); and 3) primary angle closure suspect (PACS; 36 eyes). Complete ophthalmic examination including gonioscopy, A-scan biometry, and AS-OCT were performed. Read More

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http://dx.doi.org/10.1016/j.joco.2016.06.005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5093787PMC
December 2016
14 Reads

Comparison of Anterior Chamber Parameters in Patients With Plateau Iris Configuration and Pupillary Block Using ASOCT.

J Glaucoma 2017 Feb;26(2):153-158

*Koret Vision Center, San Francisco Medical School, University of California, San Francisco, CA †Farabi Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran ‡Departments of Ophthalmology, University of Melbourne, Melbourne, Vic., Australia.

Purpose: To quantitatively analyze the anterior chamber parameters in patients with pupillary block (PB) and plateau iris configuration (PIC) using anterior segment optical coherence tomography (ASOCT).

Patients And Methods: In this cross-sectional study, nonglaucomatous subjects consecutively recruited and a total of 212 eyes divided into 3 groups of PIC (31 eyes), PB (60 eyes), and open angles (121 eyes) based on gonioscopic and ultrasound biomicroscopy findings. All patients underwent ASOCT imaging and A-scan biometry of both eyes. Read More

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http://dx.doi.org/10.1097/IJG.0000000000000579DOI Listing
February 2017
11 Reads

Preoperative evaluation of human crystalline lens hardness using A-scan ultrasound biometry: a pilot study.

Int J Ophthalmol 2016 18;9(10):1521-1523. Epub 2016 Oct 18.

2nd Department of Ophthalmology, Aristotle University of Thessaloniki, Papageorgiou General Hospital, Thessaloniki 56429, Greece.

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http://dx.doi.org/10.18240/ijo.2016.10.25DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5075672PMC
October 2016
4 Reads

Biometric Factors Associated With Acute Primary Angle Closure: Comparison of the Affected and Fellow Eye.

Invest Ophthalmol Vis Sci 2016 Oct;57(13):5320-5325

Singapore Eye Research Institute, Singapore 3Singapore National Eye Centre, Singapore 4Yong Loo Lin School of Medicine, National University of Singapore, Singapore.

Purpose: To compare ocular biometric and anterior segment parameters between the affected and fellow eye in subjects with acute primary angle closure (APAC).

Methods: We evaluated 76 subjects with unilateral APAC who had undergone bilateral laser peripheral iridotomy before enrollment. Imaging was done using anterior segment optical coherence tomography and a customized software was used to measure the following: angle opening distance (AOD750); trabecular-iris space area (TISA750); iris thickness (IT750); iris curvature (ICURV); iris area (IAREA); anterior chamber depth; area and volume (ACD; ACA and ACV); anterior chamber width (ACW); anterior vault (ACD+LV); lens vault (LV); and pupil diameter (PD). Read More

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http://dx.doi.org/10.1167/iovs.16-20006DOI Listing
October 2016
25 Reads
2 Citations
3.404 Impact Factor

Comparison of ultrasound biomicroscopy and ultrasonographic parameters in eyes with phacomorphic glaucoma and eyes with mature cataract.

Int Ophthalmol 2017 Aug 13;37(4):849-858. Epub 2016 Sep 13.

Institute of Ophthalmology, Joseph Eye Hospital, Tiruchirappalli, 620001, Tamil Nadu, India.

Purpose: To compare data on anatomical and biometric parameters, and their combination, obtained by using ultrasound biomicroscopy (UBM) and A-scan in eyes with phacomorphic glaucoma (PG) and eyes with mature cataract and to determine differences that may predispose to development of PG.

Methods: Eighty patients (80 eyes) were enrolled in this cross-sectional study. Anterior chamber parameters, namely anterior chamber depth (ACD), angle-opening distance (AOD), iris-lens contact distance (ILCD), and trabecular-ciliary process distance (TCPD), among other parameters, were assessed by UBM (35 MHz), while axial length (AL) and lenticular thickness (LT) were determined by A-scan biometry. Read More

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http://dx.doi.org/10.1007/s10792-016-0343-zDOI Listing
August 2017
13 Reads

Performance of the SRK/T formula using A-Scan ultrasound biometry after phacoemulsification in eyes with short and long axial lengths.

BMC Ophthalmol 2016 Jul 8;16:96. Epub 2016 Jul 8.

Department of Ophthalmology, Istanbul Medipol University, Esenler Hospital, Birlik Mah., Bahceler Cad., Number 5, Esenler, Istanbul, 34230, Turkey.

Background: The SRK/T formula is one of the third generation IOL calculation formulas. The purpose of this study was to evaluate the performance of the SRK/T formula in predicting a target refraction ±1.0D in short and long eyes using ultrasound biometry after phacoemulsification. Read More

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http://dx.doi.org/10.1186/s12886-016-0271-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4938914PMC
July 2016
6 Reads

Comparison axial length measurements from three biometric instruments in high myopia.

Int J Ophthalmol 2016 18;9(6):876-80. Epub 2016 Jun 18.

Department of Ophthalmology, the Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai 200233, China.

Aim: To compare the axial lengths (ALs) measured with Lenstar, IOLMaster and A-scan contact ultrasound (Ultrasound) in normal and high myopia (HM).

Methods: Eighty-four normal eyes and 49 HM eyes were included. Three consecutive measurements were performed on each eye in the following order: Lenstar, IOLMaster, and Ultrasound. Read More

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http://www.ijo.cn/gjyken/ch/reader/view_abstract.aspx?file_n
Publisher Site
http://dx.doi.org/10.18240/ijo.2016.06.15DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4916146PMC
July 2016
7 Reads

Risk factors for open-angle glaucoma in Nigeria: results from the Nigeria National Blindness and Visual Impairment Survey.

BMC Ophthalmol 2016 Jun 7;16:78. Epub 2016 Jun 7.

International Centre for Eye Health (ICEH), Department of Clinical Research, London School of Hygiene & Tropical Medicine (LSHTM), Keppel Street, London, WC1E 7HT, UK.

Background: The glaucoma-specific blindness prevalence in Nigeria (0.7 %, 95 % CI 0.6-0. Read More

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http://dx.doi.org/10.1186/s12886-016-0264-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4895902PMC
June 2016
9 Reads

Comparison of ocular biometry measurements by applanation and immersion A-scan techniques.

J Curr Ophthalmol 2015 Sep-Dec;27(3-4):110-4. Epub 2016 Feb 9.

Department of Ophthalmology, University of Ilorin Teaching Hospital, Nigeria.

Purpose: The study compared ocular biometry values using applanation and immersion techniques to determine the most applicable method for our tertiary training centre where personnel with different levels of experience and expertise in biometry take measurements used in calculation of required intraocular lens before cataract surgery.

Methods: The study was a prospective cross-sectional comparative study of different techniques of ocular biometry from diagnostic equipment (biometry probe 10 MHz Sonomed(®) A-scan (PACSCAN 300A, USA). Measurement variables were obtained among children and adults undergoing cataract surgery. Read More

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http://dx.doi.org/10.1016/j.joco.2015.12.002DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4881192PMC
May 2016
13 Reads

Detection and interpretation of shared genetic influences on 42 human traits.

Nat Genet 2016 07 16;48(7):709-17. Epub 2016 May 16.

23andMe, Inc., Mountain View, California, USA.

We performed a scan for genetic variants associated with multiple phenotypes by comparing large genome-wide association studies (GWAS) of 42 traits or diseases. We identified 341 loci (at a false discovery rate of 10%) associated with multiple traits. Several loci are associated with multiple phenotypes; for example, a nonsynonymous variant in the zinc transporter SLC39A8 influences seven of the traits, including risk of schizophrenia (rs13107325: log-transformed odds ratio (log OR) = 0. Read More

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http://dx.doi.org/10.1038/ng.3570DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5207801PMC
July 2016
46 Reads

Predicting Accommodative Response Using Paraxial Schematic Eye Models.

Optom Vis Sci 2016 07;93(7):692-704

*PhD The College of Optometry, University of Houston, Houston, Texas (all authors).

Purpose: Previous ultrasound biomicroscopy (UBM) studies showed that accommodative optical response (AOR) can be predicted from accommodative biometric changes in a young and a pre-presbyopic population from linear relationships between accommodative optical and biometric changes, with a standard deviation of less than 0.55D. Here, paraxial schematic eyes (SE) were constructed from measured accommodative ocular biometry parameters to see if predictions are improved. Read More

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https://insights.ovid.com/crossref?an=00006324-201607000-000
Publisher Site
http://dx.doi.org/10.1097/OPX.0000000000000868DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4916040PMC
July 2016
13 Reads

The accuracy of axial length measurements in cases of macula-off retinal detachment.

Can J Ophthalmol 2016 Apr;51(2):108-12

Ophthalmology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt.

Objective: To assess the accuracy of axial length measurements in cases of macula-off retinal detachment using different methods (optical biometry, A-scan ultrasound, and combined applanation vector-A/B-scan biometry).

Methods: This prospective clinical study included 100 eyes of 100 patients who underwent vitrectomy alone or phacovitrectomy for macula-off retinal detachment. All patients included signed an informed consent. Read More

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http://dx.doi.org/10.1016/j.jcjo.2015.12.011DOI Listing
April 2016
7 Reads
2 Citations
1.300 Impact Factor

Relationship between Reduced Accommodative Lag and Myopia Progression.

Optom Vis Sci 2016 07;93(7):683-91

*OD, MS †OD, PhD ‡OD Department of Optometry and Visual Science, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana (NYK, AOA, PBA, EA, KB); Department of Psychological Sciences, Vanderbilt University, Nashville, TN (CO-B).

Purpose: To determine the relationship between accommodative lag and rate of myopia progression when Ghanaian myopic school children are either undercorrected or fully corrected with single vision lenses.

Methods: A 2-year single masked randomized control trial was conducted using 150 Ghanaian myopic children aged 10 to 15 years with mean baseline myopia of -1.98 ± 0. Read More

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https://insights.ovid.com/crossref?an=00006324-201607000-000
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http://dx.doi.org/10.1097/OPX.0000000000000867DOI Listing
July 2016
5 Reads

Multicenter study of optical low-coherence interferometry and partial-coherence interferometry optical biometers with patients from the United States and China.

J Cataract Refract Surg 2016 Jan;42(1):62-7

From Stein Eye Institute (Hoffer), University of California, Los Angeles; St. Mary's Eye Center (Hoffer), Santa Monica, California; Keck School of Medicine (Shammas), Los Angeles, and; Shammas Eye Medical Center (Shammas), Lynwood, California, USA; G.B. Bietti Foundation IRCCS (Savini), Rome, Italy; School of Ophthalmology and Eye Hospital (Huang), Wenzhou Medical University, Wenzhou, China.

Purpose: To evaluate the agreement between the measurements provided by a new optical biometer, the Aladdin, based on optical low-coherence interferometry (OLCI), and those provided by the most commonly used optical biometer (IOLMaster 500), based on partial-coherence interferometry (PCI).

Setting: Multicenter clinical trial.

Design: Prospective evaluation of diagnostic test. Read More

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http://dx.doi.org/10.1016/j.jcrs.2015.07.041DOI Listing
January 2016
14 Reads

Comparison of the biometric formulas used for applanation A-scan ultrasound biometry.

Int Ophthalmol 2016 Oct 8;36(5):707-12. Epub 2016 Feb 8.

Department of Ophthalmology, Dumlupinar University School of Medicine, Kutahya, 43270, Turkey.

The purpose of the study was to compare the accuracy of various biometric formulas for predicting postoperative refraction determined using applanation A-scan ultrasound. This retrospective comparative study included 485 eyes that underwent uneventful phacoemulsification with intraocular lens (IOL) implantation. Applanation A-scan ultrasound biometry and postoperative manifest refraction were obtained in all eyes. Read More

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http://dx.doi.org/10.1007/s10792-016-0195-6DOI Listing
October 2016
3 Reads

[Intraocular lens power calculation in silicone-filled eyes].

Vestn Oftalmol 2015 Sep-Oct;131(5):26-31

Research Institute of Eye Diseases, 11 A, B Rossolimo St., Moscow, Russian Federation, 119021.

Aim: to evaluate the accuracy of different modified methods for axial length (AL) measurement in silicone-filled eyes.

Material And Methods: The study was conducted in a group of 60 patients (60 eyes) with silicone oil tamponade (Oxane 1300 cst). Axial length measurements were taken using IOL Master optical coherence biometry ('silicone-filled eye' mode) and modified A-scan ultrasound biometry (velocity of ultrasound passing through the vitreous body set at 980 m/s and 1000 m/s). Read More

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http://dx.doi.org/10.17116/oftalma2015131526-31DOI Listing
February 2016
2 Reads

Accuracy of sonographic fetal weight estimation: influence of the scan-to-delivery interval in combination with the applied weight estimation formula.

Arch Gynecol Obstet 2016 09 7;294(3):487-93. Epub 2016 Jan 7.

Department of Obstetrics and Gynecology, Erlangen University Hospital, Universitätsstrasse 21-23, 91054, Erlangen, Germany.

Introduction: To evaluate the influence of the time interval between examination and delivery on the accuracy of sonographic fetal weight estimation (WE).

Materials And Methods: 8723 singleton pregnancies were included in this retrospective cohort study. Fetuses were divided into eight groups with regard to the time interval between estimation and delivery (group 1: 0 days; group 2: 1-3 days; group 3: 4-7 days; group 4: 8-14 days; group 5: 15-21 days; group 6: 22-28 days; group 7: 29-35 days; group 8: 36-42 days). Read More

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http://link.springer.com/10.1007/s00404-015-3989-2
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http://dx.doi.org/10.1007/s00404-015-3989-2DOI Listing
September 2016
5 Reads

Lens thickness assessment: anterior segment optical coherence tomography versus A-scan ultrasonography.

Int J Ophthalmol 2015 18;8(6):1151-5. Epub 2015 Dec 18.

Koret Vision Center, San Francisco Medical School, University of California, San Francisco, CA 94143, USA.

Aim: To assess lens thickness measurements with anterior segment-optical coherence tomography (AS-OCT) in comparison with A-scan ultrasonography (A-scan US).

Methods: There were 218 adult subjects (218 eyes) aged 59.2±9. Read More

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http://dx.doi.org/10.3980/j.issn.2222-3959.2015.06.13DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4651880PMC
December 2015
43 Reads

Changes in choroidal thickness after prophylactic iridectomy in primary angle closure suspect eyes using enhanced depth imaging optical coherence tomography.

Indian J Ophthalmol 2015 Oct;63(10):763-6

Department of Glaucoma, Clinical Research Center, Institution of Drug Clinical Trials, Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-sen University, 54S.Xianlie Road, Guangzhou 510060, People's Republic of China.

Purpose: The aim of the present study was to evaluate the effect of surgical peripheral iridectomy (SPI) on choroidal thickness in primary angle-closure suspect (PACS) eyes.

Materials And Methods: This was a prospective observational case series of 30 subjects with PACS. Ocular biometry was performed before SPI (baseline) and then 1 week later. Read More

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http://dx.doi.org/10.4103/0301-4738.171504DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4728973PMC
October 2015
11 Reads

A Population-based survey of the prevalence and types of glaucoma in Nigeria: results from the Nigeria National Blindness and Visual Impairment Survey.

BMC Ophthalmol 2015 Dec 12;15:176. Epub 2015 Dec 12.

International Centre for Eye Health (ICEH), Clinical Research Department, London School of Hygiene and Tropical Medicine (LSHTM), Keppel Street, London, WC1E 7HT, UK.

Background: Glaucoma is the leading cause of irreversible blindness worldwide. There tends to be a lower reporting of glaucoma in Africa compared to other blinding conditions in global burden data. Research findings of glaucoma in Nigeria will significantly increase our understanding of glaucoma in Nigeria, in people of the West African diaspora and similar population groups. Read More

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http://dx.doi.org/10.1186/s12886-015-0160-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4676891PMC
December 2015
10 Reads

Refractive errors and ocular biometry components in thalassemia major patients.

Int Ophthalmol 2016 Apr 8;36(2):267-71. Epub 2015 Dec 8.

Thalassemia Research Center, Mazandaran University of Medical Sciences, Sari, Iran.

The aim of this study is to determine and compare biometric and refractive characteristics of thalassemia major patients and normal individuals. In this cross-sectional study, 54 thalassemia major patients were selected randomly as case group, and 54 age- and sex-matched healthy subjects were regarded as control group. Refractive errors, corneal curvature and ocular components were measured by autokeratorefractometery and A-scan ultrasonography, respectively. Read More

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http://link.springer.com/content/pdf/10.1007%2Fs10792-015-01
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http://link.springer.com/10.1007/s10792-015-0161-8
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http://dx.doi.org/10.1007/s10792-015-0161-8DOI Listing
April 2016
2 Reads

Comparison of Anterior Segment-Optical Coherence Tomography Parameters in Phacomorphic Angle Closure and Acute Angle Closure Eyes.

Invest Ophthalmol Vis Sci 2015 Dec;56(13):7611-7

Koret Vision Center, University of California, San Francisco Medical School, San Francisco, California, United States.

Purpose: The purpose of this study is to compare anterior segment-optical coherence tomography (AS-OCT) parameters in phacomorphic angle closure and acute primary angle closure (APAC) eyes.

Methods: In this cross-sectional case series, a total of 134 patients with phacomorphic angle closure (28 eyes) or APAC (54 eyes), as well as normal control subjects (52 eyes), were enrolled. Patients underwent AS-OCT imaging and A-scan biometry of both eyes. Read More

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http://dx.doi.org/10.1167/iovs.15-17336DOI Listing
December 2015
41 Reads

Biometric and refractive changes after orbital decompression in Korean patients with thyroid-associated orbitopathy.

Eye (Lond) 2016 Mar 20;30(3):400-5. Epub 2015 Nov 20.

Department of Ophthalmology, Chung-Ang University College of Medicine, Chung-Ang University Hospital, Seoul, Korea.

Purpose: To determine the biometric and refractive changes after orbital decompression in Korean patients with thyroid-associated orbitopathy (TAO).

Methods: Retrospective, observational study (between October 2012 and September 2014) was performed. Patients with TAO undergoing orbital decompression for stable proptosis received ophthalmic examinations, including Hertel exophthalmometry, A-scan biometry, autorefraction measures, corneal topography, and wavefront aberration measures, before orbital decompression and again 2 months after surgery. Read More

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http://www.nature.com/articles/eye2015242
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http://dx.doi.org/10.1038/eye.2015.242DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4791698PMC
March 2016
20 Reads

Biometric Changes After Trabeculectomy with Contact and Non-contact Biometry.

Optom Vis Sci 2016 Feb;93(2):136-40

*MSc †MD ‡PhD Ophthalmic Epidemiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran (AA, MP, HE, SY, EG); and Department of Epidemiology and Biostatistics, Tehran University of Medical Sciences, Tehran, Iran (MY).

Purpose: To compare biometric changes measured with contact and noncontact methods after mitomycin-C-augmented trabeculectomy.

Methods: In this prospective study, 31 eyes from 31 glaucoma patients scheduled for primary trabeculectomy were enrolled. Biometric parameters including axial length (AL), anterior chamber depth (ACD), and lens thickness (LT) were measured using contact ultrasound biometry (UD-6000 Ultrasonic A/B scanner biometer; Tomey Corporation, Nagoya, Japan) and a noncontact optical biometry device (Lenstar; Haag-Streit AG, Koeniz, Switzerland). Read More

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http://pdfs.journals.lww.com/optvissci/2016/02000/Biometric_
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http://content.wkhealth.com/linkback/openurl?sid=WKPTLP:land
Publisher Site
http://dx.doi.org/10.1097/OPX.0000000000000781DOI Listing
February 2016
11 Reads

Analysis of Changes in Refraction and Biometry of Atropine- and Placebo-Treated Eyes.

Invest Ophthalmol Vis Sci 2015 Aug;56(9):5650-5

Singapore Eye Research Institute, Singapore 3Singapore National Eye Centre, Singapore 4Duke NUS Graduate Medical School, Singapore.

Purpose: To analyze changes in refraction and associated biometric changes in atropine- and placebo-treated eyes in the Atropine for Treatment of Myopia study (ATOM1).

Methods: A total of 400 myopic children, aged 6 to 12 years, were assigned randomly to receive 1% atropine or a placebo agent in one eye daily for 2 years, after which drops were stopped and children monitored for another year. Cycloplegic autorefraction, A-scan biometry, and automated keratometry were performed at the initial visit, 2 weeks (baseline), and at 4, 8, 12, 16, 20, 24, 30, and 36 months. Read More

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http://dx.doi.org/10.1167/iovs.14-14716DOI Listing
August 2015
7 Reads
3 Citations
3.404 Impact Factor

The relationship of birth weight, gestational age, and postmenstrual age with ocular biometry parameters in premature infants.

Arq Bras Oftalmol 2015 May-Jun;78(3):146-9

Ophthalmology Department, Kastamonu Faculty of Medicine, Hacettepe University, Ankara, Turkey.

Purpose: To analyze ocular biometry parameters and evaluate their relationship with gestational age, birth weight, and postmenstrual age in prematurely born infants.

Methods: The right eyes of 361 premature infants born before the 36th gestational week were evaluated. Birth weight, gestational week, and gender were recorded. Read More

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http://dx.doi.org/10.5935/0004-2749.20150038DOI Listing
December 2015
10 Reads
1 Citation
0.440 Impact Factor

Plateau iris in Japanese patients with primary angle closure and primary angle closure glaucoma.

Clin Ophthalmol 2015 29;9:1159-63. Epub 2015 Jun 29.

Mizoguchi Eye Clinic, Nagasaki, Japan ; Nishigaki Eye Clinic, Nagoya, Japan.

Purpose: To determine the prevalence of plateau iris in Japanese patients with primary angle closure (PAC) and primary angle closure glaucoma (PACG) and analyze the biometric parameters in patients with plateau iris using ultrasound biomicroscopy (UBM).

Methods: In this cross-sectional observational study, subjects aged >50 years with PAC and PACG who had previously undergone a patent laser peripheral iridotomy underwent UBM in one eye. UBM images were qualitatively analyzed using standardized criteria. Read More

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http://dx.doi.org/10.2147/OPTH.S80724DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4494604PMC
July 2015
4 Reads

The effect of pupil dilation on AL-Scan biometric parameters.

Int Ophthalmol 2016 Apr 27;36(2):179-83. Epub 2015 Jun 27.

Department of Ophthalmology, Faculty of Medicine, Ondokuz Mayıs University, 55139, Samsun, Turkey.

The purpose of this study was to investigate the effects of pupil dilation on the parameters of the AL-Scan (Nidek Co., Ltd, Gamagori, Japan). We compared the measurements of axial length (AL), anterior chamber depth (ACD), central corneal keratometry reading, pupil diameter, and intraocular lens (IOL) power of 72 eyes of 72 healthy volunteers and patients scheduled for cataract surgery before and 45 min after instillation of cyclopentolate hydrochloride 1 % using the AL-Scan. Read More

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http://dx.doi.org/10.1007/s10792-015-0097-zDOI Listing
April 2016
3 Reads

Foveal and Macular Thickness Evaluation by Spectral OCT SLO and Its Relation with Axial Length in Various Degree of Myopia.

J Clin Diagn Res 2015 Mar 1;9(3):NC01-4. Epub 2015 Mar 1.

Professor and Head of the Department, Department of Ophthalmology, Mahatma Gandhi Medical College and Research Institute, Sribalaji Vidyapeeth University , Pondicherry, India .

Purpose: To evaluate the foveal and macular thickness in various degrees of myopia and its association with axial length in low, moderate and high degrees of myopia.

Design: A cross-sectional study was done in the Department of Ophthalmology, MGMCRI, Pondicherry, India.

Materials And Methods: One hundred and twenty five eyes eyes of 64 myopic subjects between the age group of 20-40 who fulfilled the inclusion criteria were selected and complete ophthalmic examination was done. Read More

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http://jcdr.net/article_fulltext.asp?issn=0973-709x&year
Publisher Site
http://dx.doi.org/10.7860/JCDR/2015/11780.5676DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4413092PMC
March 2015
8 Reads