569 results match your criteria hyperopic shift


Contribution of M-opsin-based color vision to refractive development in mice.

Exp Eye Res 2021 Jun 12;209:108669. Epub 2021 Jun 12.

Department of Ophthalmology, Eye & ENT Hospital Affiliated to Fudan University, Shanghai, China; Department of Ophthalmology, Zhongshan Hospital Affiliated to Fudan University, Shanghai, China. Electronic address:

M-opsin, encoded by opn1mw gene, is involved in green-light perception of mice. The role of M-opsin in emmetropization of mice remains uncertain. To answer the above question, 4-week-old wild-type (WT) mice were exposed to white light or green light (460-600 nm, a peak at 510 nm) for 12 weeks. Read More

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Refractive accuracy and visual outcomes after combined descemet membrane endothelial keratoplasty and cataract surgery: A French multicentric study.

J Fr Ophtalmol 2021 Jun 25;44(6):792-798. Epub 2021 May 25.

Department of Ophthalmology, Rouen University Hospital, 1, Rue de Germont, 76031 Rouen cedex, France.

Purpose: Descemet membrane endothelial keratoplasty (DMEK) combined with cataract extraction and intraocular lens insertion (new triple procedure) limits postoperative refractive errors. The objective of this study was to assess refractive accuracy after DMEK combined with cataract extraction and intraocular lens implantation.

Setting: Four university hospitals (Rouen, Paris, Reims, Grenoble). Read More

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Change in Refractive Error Associated With the Use of Cannabidiol Oil.

Cureus 2021 Apr 12;13(4):e14434. Epub 2021 Apr 12.

Department of Ophthalmology and Visual Sciences, University of Texas Medical Branch, Galveston, USA.

Cannabinoid (CBD) products have gained popularity since their legalization in 2018, causing a plethora of unregulated CBD products to be sold in the United States. These products are available in various combinations for topical and oral consumption, claiming credit for potentially improving various diseases. In this report, we present a newfound case reporting a shift in refraction that may be associated with the regular use of CBD oil supplements. Read More

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Short-Term Anterior Segment Changes After Nd-YAG Laser Posterior Capsulotomy in Pseudophakic Eyes with Fuchs' Endothelial Dystrophy.

Clin Ophthalmol 2021 30;15:1819-1825. Epub 2021 Apr 30.

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

Purpose: To describe the changes in the central corneal thickness (CCT), endothelial cell count (ECC), intraocular lens (IOL) position, and refractive error 1 and 3 months after Nd-YAG laser posterior capsulotomy (YAG-PC) for posterior capsular opacification (PCO) in pseudophakic eyes with Fuchs' endothelial cell dystrophy (FECD).

Design: Prospective case-control.

Participants: Fifty pseudophakic eyes of 50 patients with visually significant PCO (25 with healthy corneas, and 25 with FECD grade 1 and 2). Read More

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Slowing Down Myopia Progression with Contact Lenses - Everyday Cases from the Clinic.

Klin Monbl Augenheilkd 2021 Apr 30;238(4):437-442. Epub 2021 Apr 30.

Ophthalmology, Universitätsspital Basel Augenklinik, Basel, Switzerland.

Background: An estimated 49.8% of the world population will be myopic by 2050. Multifocal contact lenses (MFCLs) and orthokeratology (OK) reduce peripheral retinal hyperopic defocus, which animal studies have shown to positively impact eye growth. Read More

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Spectral composition of artificial illuminants and their effect on eye growth in chicks.

Exp Eye Res 2021 Jun 27;207:108602. Epub 2021 Apr 27.

New England College of Optometry, Department of Biomedical Science and Disease, Boston, MA, United States. Electronic address:

In broadband light, longitudinal chromatic aberration (LCA) provides emmetropization signals from both wavelength defocus and the resulting chromatic cues. Indoor illuminants vary in their spectral output, potentially limiting the signals from LCA. Our aim is to investigate the effect that artificial illuminants with different spectral outputs have on chick emmetropization with and without low temporal frequency modulation. Read More

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Protective effects of sunlight exposure against PRK-induced myopia in infant rhesus monkeys.

Ophthalmic Physiol Opt 2021 Jul 20;41(4):911-921. Epub 2021 Apr 20.

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

Purpose: Extensive clinical evidence suggests that time spent outdoors might reduce the risk of myopia. This study aimed to determine whether increasing sunlight exposure has a protective effect on hyperopic-defocus induced myopia in a non-human primate.

Methods: Twelve 2-month-old rhesus monkeys were treated monocularly with photorefractive keratectomy (PRK) (4. Read More

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To compare on-axis measurements of the axial length with off-axis measurements in the paracentral horizontal and vertical positions.

Semin Ophthalmol 2021 Apr 4:1-4. Epub 2021 Apr 4.

Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

: To compare on-axis measurements of the axial length (AL) with off-axis measurements in the paracentral horizontal and vertical positions using the Lenstar LS 900 biometer.: In this, the samples were selected from patients scheduled for cataract surgery using a systematic randomization method. After applying the exclusion criteria, all subjects underwent optometric examinations and AL measurement using the Lenstar. Read More

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Persistent Globe Flattening in Astronauts following Long-Duration Spaceflight.

Neuroophthalmology 2021 3;45(1):29-35. Epub 2020 Sep 3.

Department of Ophthalmology, Blanton Eye Institute, Houston Methodist Hospital, Houston, Texas, USA.

Posterior globe flattening has been well-documented in astronauts both during and after long-duration space flight (LDSF) and has been observed as early as 10 days into a mission on the International Space Station. Globe flattening (GF) is thought to be caused by the disc centred anterior forces created by elevated volume and/or pressure within the optic nerve sheath (ONS). This might be the result of increased intracranial pressure, increased intraorbital ONS pressure from compartmentalisation or a combination of these mechanisms. Read More

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September 2020

Temporary changes of visual outcomes and anterior chamber parameters after phacoemulsification and low-add-power segmented intraocular lens implantation for primary angle closure disease.

Int Ophthalmol 2021 Mar 22. Epub 2021 Mar 22.

Department of Ophthalmology, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara City, Okinawa, 903-0215, Japan.

Purpose: To evaluate the temporary changes in visual outcomes and anterior segment parameters after cataract surgery plus low-add bifocal intraocular lens (IOL) implantation for primary angle closure disease (PACD).

Methods: This retrospective comparative case-control study included two groups: low-add-power segmented IOL and monofocal IOL. Postoperative examination involved evaluation of uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), uncorrected intermediate visual acuity (UIVA), and spherical equivalent (SE). Read More

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Partial corneal recovery following selective trabeculoplasty-induced keratopathy: Longitudinal analysis through scheimpflug imaging.

Am J Ophthalmol Case Rep 2021 Jun 26;22:101062. Epub 2021 Feb 26.

Glaucoma Unit, Hospital Medicina dos Olhos, 207, Salem Bechara Street, Osasco, São Paulo, 06018-180, Brazil.

Purpose: To report an uncommon case of hyperopic shift and corneal haze, flattening and thinning following a single session of selective laser trabeculoplasty (SLT), and provide longitudinal clinical data and serial analyses of corneal profile through Scheimpflug imaging. Furthermore, a careful literature review was undertaken to determine possible risk factors for this complication.

Observations: A 47-year-old woman presented with blurred vision and mild corneal edema and haze three days following routine SLT. Read More

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Refractive Outcomes and Anterior Chamber Depth after Cataract Surgery in Eyes with and without Previous Pars Plana Vitrectomy.

Curr Eye Res 2021 Mar 5:1-8. Epub 2021 Mar 5.

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

To compare the differences in refractive outcome and anterior chamber depth (ACD) after phacoemulsification between eyes with and without previous pars plana vitrectomy (PPV). Patients who had significant cataracts after PPV were included in the study group, and patients with a matched axial length (AL) who had cataracts without PPV were selected as the control group. The performance of new generation intraocular lens (IOL) power calculation formulas (Barrett Universal II, Kane, Ladas Super formulas), and the traditional formulas (SRK/T, Holladay 1, Hoffer Q, Haigis) with and without the Wang-Koch (WK) AL adjustment were compared between the two groups. Read More

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Effects of blue light-exposed retinal pigment epithelial cells on the process of ametropia.

Biochem Biophys Res Commun 2021 Apr 27;549:14-20. Epub 2021 Feb 27.

Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China; Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, 200011, China. Electronic address:

Ametropia is one of the most common ocular disorders worldwide, to which almost half of visual impairments are attributed. Growing evidence has linked the development of ametropia with ambient light, including blue light, which is ubiquitous in our surroundings and has the highest photonic energy among the visible spectrum. However, the underlying mechanism of blue light-mediated ametropia remains controversial and unclear. Read More

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Is hypermetropia regressing in accommodative esotropia?

Arq Bras Oftalmol 2021 Mar-Apr;84(2):128-132

Ophthalmology Department, Ankara Atatürk Education and Research Hospital, Ankara Yıldırım Beyazıt University Medical Faculty, Ankara, Turkey.

Purposes: To evaluate the relationship of changes in hypermetropia and ocular alignment in patients with accommodative esotropia.

Methods: The medical records of consecutive patients diagnosed with refractive accommodative esotropia (esotropia eliminated or decreased to within 10 D with full hyperopic correction) were retrospectively reviewed. Cycloplegic refractions culled from medical records were converted into spherical equivalents. Read More

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Intraocular lens power calculation for plus and minus lenses in high myopia using partial coherence interferometry.

Int Ophthalmol 2021 May 1;41(5):1585-1592. Epub 2021 Feb 1.

Department of Ophthalmology, RWTH Aachen University, Pauwelsstrasse 30, 52074, Aachen, Germany.

Purpose: We assessed the accuracy of lens power calculation in highly myopic patients implanting plus and minus intraocular lenses (IOL).

Methods: We included 58 consecutive, myopic eyes with an axial length (AL) > 26.0 mm, undergoing phacoemulsification and IOL implantation following biometry using the IOLMaster 500. Read More

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Short-term effect of atropine on higher-order aberrations in myopic children.

J Chin Med Assoc 2021 Apr;84(4):441-445

Department of Ophthalmology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.

Background: This study aimed to investigate the short-term effect of cycloplegia on higher-order aberrations (HOAs) in school-age myopic children who received 0.25% atropine for cycloplegic refraction.

Methods: We performed a retrospective chart review of 24 myopic children between the ages of 5 and 15 years, who had received one topical drop of 0. Read More

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Gender and age distribution of refractive errors in an optometric clinical population.

J Optom 2021 Jan 21. Epub 2021 Jan 21.

Discipline of Optometry, School of Health Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa. Electronic address:

Aim: To determine the patterns of distribution of refractive errors in a clinical sample of patients examined in an optometry practice.

Method: In this retrospective study, the clinic records of 6687 patients aged 6 to 85 years comprising 2168 (32.2%) males and 4519 (67. Read More

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January 2021

Ibrutinib for Control of Choroidal and Orbital Metastasis from Chronic Lymphocytic Leukemia.

Retin Cases Brief Rep 2021 Jan 12. Epub 2021 Jan 12.

Department of Ophthalmology, University of Virginia, Charlottesville, Virginia.

Purpose: Describe a case of control of choroidal and orbital metastasis of chronic lymphocytic leukemia (CLL) with Ibrutinib monotherapy, an oral tyrosine kinase inhibitor.

Methods: Single case report.

Results: A 69-year-old man with a past medical history of CLL diagnosed 1 year prior was referred with a foveal lesion in the right eye (OD), and was found to have hyperopic shift OD. Read More

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January 2021

Post-operative optical coherence tomography angiography features of chorioretinal folds resulting from pleomorphic adenoma of the lacrimal gland (PALG) of orbit- a case report.

BMC Ophthalmol 2020 Dec 10;20(1):486. Epub 2020 Dec 10.

Department of Ophthalmology, Chang Gung Memorial Hospital, No. 6, West section, Chia-Pu RoadPu-Zih City, Chia-Yi County, Taiwan.

Background: Chorioretinal fold (CFs) is a rare condition resulting from undulations in the choriocapillaris, Bruch's membrane, retinal pigment epithelium and occasionally neurosensory retina. It can be idiopathic or due to different etiologies. The use of spectral-domain optical coherence tomography (SD-OCT) has increased the diagnosis of CFs and helped in differentiation from other etiologies. Read More

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December 2020

[Change of corneal radii after Descemet membrane endothelial keratoplasty measured by optical coherence tomography and Scheimpflug tomography].

Ophthalmologe 2020 Dec 10. Epub 2020 Dec 10.

Klinik für Augenheilkunde, Universitätsklinikum Münster, Domagkstr. 15, 48149, Münster, Deutschland.

Background: The aim of the study was to compare the measurement of corneal radii using Scheimpflug tomography (Pentacam®, Oculus, Wetzlar, Germany) and optical coherence tomography (OCT, Optovue® XR-Avanti, Fremont, CA, USA) in eyes of patients with Fuchs' endothelial dystrophy (FED) before and after Descemet membrane endothelial keratoplasty (DMEK).

Material And Methods: In a retrospective analysis 35 eyes with (FED) that underwent DMEK were included. Pentacam® and Optovue® corneal measurements were performed preoperatively and at least 3 months postoperatively. Read More

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December 2020

Anterior chamber depth, lens thickness and intraocular lens calculation formula accuracy: nine formulas comparison.

Br J Ophthalmol 2020 Nov 23. Epub 2020 Nov 23.

Ophthalmology Department, Centro Hospitalar de Lisboa Central EPE, Lisboa, Lisboa, Portugal.

Background/aims: To investigate the influence of anterior chamber depth (ACD) and lens thickness (LT) on 9 intraocular lens (IOL) power calculation formulas accuracy, in patients with normal axial lengths.

Methods: Retrospective case series, including patients having uncomplicated cataract surgery with insertion of a single IOL model, divided into three groups according to preoperative ACD. Each group was further subdivided into three subgroups, according to the LT. Read More

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November 2020

Analysis and Causation of All Inaccurate Outcomes After WaveLight Contoura LASIK with LYRA Protocol.

Authors:
Manoj Motwani

Clin Ophthalmol 2020 13;14:3841-3854. Epub 2020 Nov 13.

Motwani LASIK Institute, San Diego, CA 92121, USA.

Purpose: This study analyzes every eye that had an outcome greater than 0.25D of sphere or astigmatism from planned goal after treatment with WaveLight Contoura with LYRA Protocol.

Methods: The study included 266 consecutive eyes treated with LASIK Contoura using the LYRA Protocol. Read More

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November 2020

Descemet-stripping automated endothelial keratoplasty with intrascleral haptic-fixated intraocular lens in a sequential vs simultaneous approach.

J Cataract Refract Surg 2021 Jun;47(6):767-772

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

Purpose: To compare the outcomes of Descemet-stripping automated endothelial keratoplasty (DSAEK) with intrascleral haptic-fixated intraocular lens (IOL) in a sequential and simultaneous approach.

Setting: Tertiary eyecare center.

Design: Prospective randomized comparative study. Read More

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Visual disturbances during prolonged space missions.

Curr Opin Ophthalmol 2021 Jan;32(1):69-73

Department of Orthopaedic Surgery, University of California, San Diego, California, USA.

Purpose Of Review: During prolonged spaceflight, astronauts often experience ocular changes, due to constant head-ward fluid shifts in space as compared with Earth. This article reviews symptoms, likely causes, and potential solutions, such as lower body negative pressure, to counteract space-associated neuroocular syndrome (SANS).

Recent Findings: Low gravity conditions and other aspects of spaceflight affect the eye detrimentally, causing SANS which is characterized by optic disc edema, choroidal thickening, cotton wool spots, and a hyperopic shift. Read More

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January 2021

Assessing the validity of corneal power estimation using conventional keratometry for intraocular lens power calculation in eyes with Fuch's dystrophy undergoing Descemet membrane endothelial keratoplasty.

Graefes Arch Clin Exp Ophthalmol 2021 Apr 13;259(4):1061-1070. Epub 2020 Nov 13.

Department of Ophthalmology, University of Muenster Medical Center, Albert-Schweitzer-Campus 1, Building D15, 48149, Muenster, Germany.

Purpose: The present retrospective study was designed to test the hypothesis that the postoperative posterior to preoperative anterior corneal curvature radii (PPPA) ratio in eyes with Fuch's dystrophy undergoing Descemet membrane endothelial keratoplasty (DMEK) is significantly different to the posterior to anterior corneal curvature radii (PA) ratio in virgin eyes and therefore renders conventional keratometry (K) and the corneal power derived by it invalid for intraocular lens (IOL) power calculation.

Methods: Measurement of corneal parameters was performed using Scheimpflug imaging (Pentacam HR, Oculus, Germany). In 125 eyes with Fuch's dystrophy undergoing DMEK, a fictitious keratometer index was calculated based on the PPPA ratio. Read More

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Refractive Outcomes After Descemet Membrane Endothelial Keratoplasty + Cataract/Intraocular Lens Triple Procedure: A Fellow Eye Comparison.

Cornea 2021 Jul;40(7):883-887

Department of Ophthalmology, Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany.

Purpose: Descemet membrane endothelial keratoplasty is often combined with phacoemulsification and intraocular lens implantation (DMEK + cataract/IOL triple procedure) in phakic patients. This procedure results in a refractive shift that is difficult to predict. The aim of this study was to evaluate the hypothesis that the refractive shift in the second eye follows the shift in the first eye. Read More

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Long-term Results of a Combined Procedure of Cataract Surgery and Descemet Membrane Endothelial Keratoplasty With Stromal Rim.

Cornea 2021 May;40(5):628-634

Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.

Purpose: To evaluate the long-term results of combining cataract surgery, intraocular lens (IOL) implantation, and Descemet membrane endothelial keratoplasty with peripheral stromal support (DMEK-S).

Methods: The outcomes of 107 eyes of 37 patients who had undergone a combination of cataract surgery, IOL implantation, and DMEK-S between October 2007 and February 2015 were retrospectively evaluated. The average follow-up duration was 18. Read More

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Comparison of aphakic refraction and biometry-based formulae for secondary in-the-bag and sulcus-implanted intraocular lens power estimation in children.

Ophthalmic Res 2020 Nov 3. Epub 2020 Nov 3.

Purpose: To compare the accuracy of refractive outcomes in children undergoing secondary in-the-bag or cilliary sulcus IOL implantation, using aphakic refraction (AR)-based formulae and biometry-based formulae.

Methods: In this retrospective study, 39 eyes of the in-the-bag IOL group and the other 26 eyes of the sulcus-implanted IOL group. Holladay 1, Hoffer Q, SRK/T and SRK II formulae were employed depending on the biometric data, while Hug and Khan formulae were used based on preoperative aphakic refraction. Read More

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November 2020

Effect of capsular tension ring on refractive results in cases with pseudoexfoliation syndrome.

Eur J Ophthalmol 2020 Oct 23:1120672120965469. Epub 2020 Oct 23.

Department of Ophthalmology, Dünyagöz Ataköy Hospital, Istanbul, Turkey.

Purpose: To investigate the effect of capsular tension rings (CTRs) on postoperative refractive results in patients with pseudoexfoliation (PSX) syndrome.

Materials And Methods: Sixty-nine patients with PSX syndrome who had uncomplicated cataract surgery between March 2016 and February 2019 were reviewed retrospectively. The patients were divided into two groups. Read More

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October 2020

Refractive outcomes following cataract combined with lamellar keratoplasty: femtosecond-DSEK versus microkeratome-DSAEK.

Int Ophthalmol 2021 Feb 22;41(2):639-647. Epub 2020 Oct 22.

S. Fyodorov Eye Microsurgery State Institution, Moscow, Russia.

Purpose: Prediction of postoperative refraction following posterior lamellar keratoplasty is crucial for choosing proper intraocular lens power in combined surgeries. Femtosecond laser-assisted Descemet stripping endothelial keratoplasty (FS-DSEK) creates thin, planar grafts while microkeratome-assisted Descemet's stripping automated endothelial keratoplasty (DSAEK) creates non-planar, concaved grafts. We evaluated whether this fundamental difference affects the refractive outcomes in cataract surgery combined with FS-DSEK compared to cataract surgery combined with microkeratome-assisted DSAEK. Read More

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February 2021