41,253 results match your criteria Refractive Eyecare [Journal]


Comparison between refractive outcomes between macula-on and macula-off retinal detachments after phaco-vitrectomy.

Jpn J Ophthalmol 2019 Apr 20. Epub 2019 Apr 20.

Department of Ophthalmology, School of Medicine, Pusan National University, Busan, South Korea.

Purpose: To evaluate axial length (AL) measurements and refractive outcomes in vitrectomy combined with cataract operation for rhegmatogenous retinal detachment (RRD) with wholly detached macula.

Study Design: Retrospective, consecutive, comparative, clinical study.

Methods: We reviewed the data of patients treated by vitrectomy combined with cataract operation for RRD. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s10384-019-00667-6DOI Listing

Analysis of molecular orientation in polymeric spherulite using polarized micro attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopic imaging.

Anal Chim Acta 2019 Aug 19;1065:79-89. Epub 2019 Feb 19.

Department of Chemical Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom. Electronic address:

Micro ATR-FTIR spectroscopic imaging enables the visualization of two-dimensional chemical distribution at a higher spatial resolution than macro-transmission FTIR imaging approach. In this study, micro ATR-FTIR imaging was applied for analysis of a specific morphology in a spherulite of poly(3-hydroxybutyrate) (PHB). The PHB spherulites crystallized at an isothermal condition, showed the fine band structure due to the twisting lamellar crystals during the spherulite growth under the polarized optical microscope (POM). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.aca.2019.02.017DOI Listing

Extracting pure absorbance spectra in infrared microspectroscopy by modeling absorption bands as Fano resonances.

J Chem Phys 2019 Apr;150(15):154124

University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA.

Midinfrared absorbance spectra obtained from spatially inhomogeneous and finite samples often contain scattering effects characterized by derivative-like bands with shifted peak positions. Such features may be interpreted and accurately modeled by Fano theory when the imaginary part of the complex dielectric function is small and Lorentzian in nature-as is the case for many biological media. Furthermore, by fitting Fano line shapes to isolated absorbance bands, recovery of the peak position and pure absorption strength can be obtained with high accuracy. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1063/1.5085207DOI Listing

Effective Topical Delivery of H-AgNPs for Eradication of Klebsiella pneumoniae-Induced Burn Wound Infection.

AAPS PharmSciTech 2019 Apr 19;20(5):169. Epub 2019 Apr 19.

Division of Pharmaceutics, University Institute of Pharmaceutical Sciences, Panjab University, Chandigarh, India.

The aim of the present study was to explore the therapeutic efficacy of microemulsion-based delivery of histidine-capped silver nanoparticles in eradicating Klebsiella pneumoniae-induced burn wound infection. The developed microemulsion was characterized on the basis of differential light scattering, phase separation, refractive index, and specific conductance. Emulgel was prepared and characterized on the basis of thixotropy, texture, differential scanning calorimetry, and release kinetics. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1208/s12249-019-1350-yDOI Listing

Possible sensor applications of selected DNA-surfactant complexes.

Eur Biophys J 2019 Apr 19. Epub 2019 Apr 19.

Department of Chemistry, University of Agriculture, 122 Balicka Str., 30-149, Cracow, Poland.

Although much research has been performed on DNA complexes carrying long alkyl chains (C10, C16, and C18), there is no information about physicochemical characterization of synthesized composites with allyl imidazole-based ionic liquids and quaternary ammonium salts with n-butyl chains. Here, complexes were synthesized by ion-exchange reactions between sonicated DNA and three ionic liquids (ILs) formed from two imidazole-based compounds, 1-allyl-3-methylimidazolium bromide (Amim) or 1-butyl-3-methylimidazolium bromide (Bmim), and from the quaternary ammonium salt tetra-n-butylammonium bromide (TBAB). Signals in UV-Vis, IR, and CD spectra indicating inclusion of small molecules into the DNA structure confirmed the formation of DNA complexes. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1007/s00249-019-01367-2DOI Listing

A modified intraocular lens design to reduce negative dysphotopsia.

J Cataract Refract Surg 2019 Apr 16. Epub 2019 Apr 16.

retired, Orange, California, USA.

Purpose: To use ray-tracing analysis and simulated retinal illumination profiles to design an intraocular lens (IOL) that prevents or reduces negative dysphotopsia after cataract surgery.

Setting: Mayo Clinic, Rochester, Minnesota, and Simpson Optics LLC, Arlington, Texas, USA.

Design: Experimental study. Read More

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S08863350193004
Publisher Site
http://dx.doi.org/10.1016/j.jcrs.2019.01.019DOI Listing
April 2019
1 Read

Two-year outcomes of a randomized controlled trial of transepithelial corneal crosslinking with iontophoresis for keratoconus.

J Cataract Refract Surg 2019 Apr 16. Epub 2019 Apr 16.

Fondazione G.B. Bietti IRCCS, Rome, Italy.

Purpose: To evaluate the 2-year clinical outcomes of corneal crosslinking (CXL) using transepithelial iontophoresis CXL (T-ionto CXL) in comparison with standard CXL for the treatment of progressive keratoconus.

Setting: Single-site study.

Design: Randomized controlled clinical trial with identifier code NCT02117999. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jcrs.2019.01.026DOI Listing

Shedding Light on the Intrinsic Characteristics of 3D Distorted Fluorite-Type Zirconium Tellurite Single Crystals.

Inorg Chem 2019 Apr 19. Epub 2019 Apr 19.

State Key Laboratory of Crystal Materials , Shandong University , Jinan , Shandong 250100 , People's Republic of China.

Transition-metal tellurites have motivated growing research interest in both fundamental and applied chemistry, and the corresponding single crystals could serve as rich and fascinating platforms to regulate, explore, and elucidate the intrinsic characteristics of different structures from 0D to 3D architectures. In this context, a zirconium tellurite (namely, ZrTeO) single crystal featuring a 3D distorted fluorite-type structure with a size of 35 × 32 × 21 mm was successfully harvested by the top-seeded solution growth (TSSG) technique. The X-ray diffraction rocking curve reflects that the crystallinity of the as-grown ZrTeO crystal is quite perfect with a small full-width at half-maximum (fwhm) value (∼39 arcsec). Read More

View Article

Download full-text PDF

Source
http://pubs.acs.org/doi/10.1021/acs.inorgchem.9b00424
Publisher Site
http://dx.doi.org/10.1021/acs.inorgchem.9b00424DOI Listing
April 2019
1 Read

Photocatalytic template removal by non-ozone generating UV radiation for the fabrication of well defined mesoporous inorganic coatings.

ACS Appl Mater Interfaces 2019 Apr 19. Epub 2019 Apr 19.

The processing of mesoporous inorganic coatings typically requires a high temperature calcination step to remove organic precursors that are essential during the material assembly. Lowering the fabrication energy costs and cutting back on the necessary resources would provide greater scope for the deployment in applications such as architectural glass, optical components, photovoltaic cells and energy storage and further compatibilize substrates with low temperature stability. Organic removal methods based on UV-ozone treatment are increasing in popularity but concerns remain regarding large-scale ozone generation and usage of mercury-containing UV lamps. Read More

View Article

Download full-text PDF

Source
http://pubs.acs.org/doi/10.1021/acsami.9b01199
Publisher Site
http://dx.doi.org/10.1021/acsami.9b01199DOI Listing
April 2019
1 Read

Prevalence of refractive errors; an evidence from the public high schools of Lahore, Pakistan.

J Pak Med Assoc 2019 Apr;69(4):464-467

Azra Naheed Medical College, The Superior University Lahore.

Objective: To assess the magnitude of refractive errors among high school children.

Methods: The cross-sectional, descriptive study was conducted from April to August 2017 in four public-sector high schools in Lahore, Pakistan. Using multistage simple random sampling, all public sector high schools of the city were initially included. Read More

View Article

Download full-text PDF

Source
April 2019
1 Read

NDE Detection Techniques and Characterization of Aluminum Wires Embedded in Honeycomb Sandwich Composite Panels Using Terahertz Waves.

Materials (Basel) 2019 Apr 17;12(8). Epub 2019 Apr 17.

Center for Nondestructive Evaluation, Iowa State University, Ames, IA 50011, USA.

For many years, scientists have been aware of the importance of terahertz waves (T-rays), which have now emerged as an NDE (nondestructive evaluation) technique for certain ranges of the electronic spectrum. The present study deals with T-ray scanning techniques of honeycomb sandwich composite panels with a carbon-fiber-reinforced plastic (CFRP) skin as well as the refractive index (), and the electrical conductivity () of glass fiber-reinforced plastic (GFRP) composites. For this experiment, the degree of penetration to FRP composites is investigated for the THz transmitted power based on the angle in the electric field (E-field) direction vs. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/ma12081264DOI Listing

A Simple, Inexpensive, and Precise Photographic Method for Intraoperative Toric IOL Alignment.

Klin Monbl Augenheilkd 2019 Apr 18;236(4):391-397. Epub 2019 Apr 18.

Dept. of Ophthalmology, Pallas Kliniken AG, Olten, Switzerland.

Background: It was the aim of this study to analyse the refractive outcome of toric intraocular lens (t-IOL) implantation guided by a newly developed method of photographic alignment.

Material And Methods: Fourteen eyes of 10 patients (6 females, 4 males, age 63.4 ± 6. Read More

View Article

Download full-text PDF

Source
http://www.thieme-connect.de/DOI/DOI?10.1055/a-0861-9601
Publisher Site
http://dx.doi.org/10.1055/a-0861-9601DOI Listing
April 2019
1 Read

Variation in gravimetric correction factors for nephelometer-derived estimates of personal exposure to PM.

Environ Pollut 2019 Apr 5;250:251-261. Epub 2019 Apr 5.

Department of Mechanical Engineering, Colorado State University, 1374 Campus Delivery, Fort Collins, CO, 80523, United States. Electronic address:

Many portable monitors for quantifying mass concentrations of particulate matter air pollution rely on aerosol light scattering as the measurement method; however, the relationship between scattered light (what is measured) and aerosol mass concentration (the metric of interest) is a complex function of the refractive index, size distribution, and shape of the particles. In this study, we compared 33-h personal PM concentrations measured simultaneously using nephelometry (personal DataRAM pDR-1200) and gravimetric filter sampling for working adults (44 participants, 249 samples). Nephelometer- and filter-derived 33-h average PM concentrations were correlated (Spearman's ρ = 0. Read More

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S02697491193029
Publisher Site
http://dx.doi.org/10.1016/j.envpol.2019.03.121DOI Listing
April 2019
1 Read

Formulation, clinical and histopathological assessment of microemulsion based hydrogel for UV protection of skin.

Colloids Surf B Biointerfaces 2019 Apr 8;179:393-404. Epub 2019 Apr 8.

Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, P.O. Box: 91388-13944, Islamic Republic of Iran.

The aim of this study was to prepare a microemulsion based hydrogel containing sesame oil and evaluate its topical application in preventing the harmful effects of UV radiation on the guinea pig's skin using histopathologic and clinical findings. Sesame oil with high antioxidant content and unique chemical and physiological properties is a suitable candidate for the evolution of UV protection on skin. Applying this natural oil in microemulsion formulation containing particles with nanometer size can enhance its efficacy. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.colsurfb.2019.04.015DOI Listing

Population prevalence of myopia, glasses wear and free glasses acceptance among minority versus Han schoolchildren in China.

PLoS One 2019 18;14(4):e0215660. Epub 2019 Apr 18.

Lancang County First People's Hospital, Lancang, Yunnan, China.

Aim: To measure myopia, glasses wear and free glasses acceptance among minority and Han children in China.

Methods: Visual acuity testing and questionnaires assessing ethnicity, study time, and parental and teacher factors were administered to a population-based sample of 9-12 year old minority and Han children in Yunnan and Guangdong, and their teachers and parents. Refraction was performed on children with uncorrected visual acuity (VA) < = 6/12 in either eye, and acceptance of free glasses assessed. Read More

View Article

Download full-text PDF

Source
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0215660PLOS

Corneal Tomography Changes and Refractive Outcomes After Descemet Stripping Without Endothelial Keratoplasty.

Cornea 2019 Apr 16. Epub 2019 Apr 16.

Cornea and Refractive Surgery Service, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA.

Purpose: To investigate corneal tomography changes and refractive outcomes after Descemetorhexis without endothelial keratoplasty (DWEK).

Methods: Retrospective chart review of 25 eyes from 16 patients with Fuchs corneal endothelial dystrophy that underwent successful DWEK combined with cataract surgery.

Results: There was no significant change in anterior corneal curvature on tomography maps. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1097/ICO.0000000000001896DOI Listing

Comparison of refractive predictability and endothelial cell loss in femtosecond laser-assisted cataract surgery and conventional phaco surgery: prospective randomised trial with 6 months of follow-up.

BMJ Open Ophthalmol 2019 1;4(1):e000233. Epub 2019 Mar 1.

Department of Ophthalmology, Rigshospitalet Glostrup, Glostrup, Denmark.

Objective: Femtosecond laser-assisted cataract surgery (FLACS) decreases the use of energy and provides a more precise capsulorhexis compared with conventional phaco surgery (CPS). The purpose of this study was to examine if the lower energy use in FLACS caused less endothelial cell loss compared with CPS and if there was a difference in refractive predictability between CPS and FLACS.

Methods And Analysis: This was a randomised controlled study of 96 patients with a 6-month follow-up comparing one eye surgery by FLACS and the contralateral eye operated by CPS (divide and conquer technique). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1136/bmjophth-2018-000233DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6440690PMC

Decoding the Information Contained in Fluorophore Radiation Patterns.

ACS Nano 2018 Dec;12(12):11725-11730

CNRS, UMR 8118, Brain Physiology Laboratory , 45 rue des Saints Pères , Paris F-75006 France.

Dipole radiation patterns change when a fluorescent molecule comes close to the boundary between media of different refractive indices. Near-interface molecules emit mostly into the higher-index medium, predominantly around the critical angle. The radiation pattern encodes information about the emitter distance, orientation, and the refractive index of the embedding medium. Read More

View Article

Download full-text PDF

Source
http://pubs.acs.org/doi/10.1021/acsnano.8b08696
Publisher Site
http://dx.doi.org/10.1021/acsnano.8b08696DOI Listing
December 2018
1 Read

Impact of Visual Cues on the Magnitude and Variability of the Accommodative Response in Children With Emmetropia and Uncorrected Hyperopia and Adults.

Invest Ophthalmol Vis Sci 2019 Apr;60(5):1527-1537

University of Houston, College of Optometry, Houston, Texas, United States.

Purpose: We investigated the effect of blur and disparity cues on accommodative accuracy (lag) and variability (time [RMS] and frequency domain [LFC]) in the developing visual system.

Methods: A total of 59 children (3-9 years, spherical equivalent refractive error [RE] = -0.3- +4. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1167/iovs.18-25256DOI Listing

The Interference Effect of Silica Colloidal Crystal Films and Their Applications on Biosensing.

Anal Chem 2019 Apr 17. Epub 2019 Apr 17.

With the aim to develop better and reliable interference effective substrates, silica colloidal crystal films with different sphere di-ameters and film thicknesses were successfully made by an improved vertical deposition method and a systematic investigation of their reflectometric interference spectroscopy (RIfS) properties was presented in this work. The influence of silica sphere diameter and film thickness on the RIfS signals was studied. Results showed that the film thickness is the key factor of RIfS signals. Read More

View Article

Download full-text PDF

Source
http://pubs.acs.org/doi/10.1021/acs.analchem.9b00620
Publisher Site
http://dx.doi.org/10.1021/acs.analchem.9b00620DOI Listing
April 2019
1 Read

The components of adult astigmatism and their age-related changes.

Ophthalmic Physiol Opt 2019 May;39(3):183-193

Department of Ophthalmology, Antwerp University Hospital, Edegem, Belgium.

Purpose: To study the corneal and internal astigmatism and the age-related changes underlying the known refractive shift with-the-rule (WTR) towards against-the-rule (ATR) astigmatism.

Methods: Refractive and corneal biometry data were collected for a total of 1195 healthy Caucasian subjects, recruited by ophthalmological centres across Europe. After conversion of refractive and corneal surface astigmatism to power vectors J and J , the total corneal and internal astigmatism were calculated. Read More

View Article

Download full-text PDF

Source
https://onlinelibrary.wiley.com/doi/abs/10.1111/opo.12616
Publisher Site
http://dx.doi.org/10.1111/opo.12616DOI Listing
May 2019
4 Reads

Engineering phonon polaritons in van der Waals heterostructures to enhance in-plane optical anisotropy.

Sci Adv 2019 Apr 12;5(4):eaau7171. Epub 2019 Apr 12.

Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.

Van der Waals (vdW) heterostructures assembled from layers of two-dimensional materials have attracted considerable interest due to their novel optical and electrical properties. Here, we report a scattering-type scanning near-field optical microscopy study of hexagonal boron nitride on black phosphorus (h-BN/BP) heterostructures, demonstrating the first direct observation of in-plane anisotropic phonon polariton modes in vdW heterostructures. Notably, the measured in-plane optical anisotropy along the armchair and zigzag crystal axes exceeds the ratio of refractive indices of BP in the - plane. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1126/sciadv.aau7171DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6461454PMC

Utilizing intraoperative aberrometry and digital eye tracking to develop a novel nomogram for manual astigmatic keratotomy to effectively decrease mild astigmatism during cataract surgery.

Taiwan J Ophthalmol 2019 Jan-Mar;9(1):27-32

Taipei Nobel Eye Clinic, Taipei, Taiwan.

Purpose: The purpose of the study is to develop a novel nomogram and validate with a retrospective comparative study for manual astigmatic keratotomy (MAK) with the assistance of intraoperative aberrometry (Optiwave Refractive Analysis [ORA]) and digital eye tracking (VERION) in mild astigmatic correction enhancement.

Setting: The study was conducted in Honolulu, Hawaii.

Design: This was a single-surgeon comparative study with retrospective data collection. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.4103/tjo.tjo_6_18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432848PMC

Intraocular lens correction of presbyopia.

Taiwan J Ophthalmol 2019 Jan-Mar;9(1):4-17

Clinical Professor, John A Burns School of Medicine, University of Hawaii, Hawaii, USA.

The continued development of intraocular lens (IOL) technology has led to a dramatic improvement in refractive outcomes. New and innovative ways of achieving the desired postoperative refractive goals continue to be developed. This article aims to review the currently available IOL modalities for correction of presbyopia at the time of cataract surgery, including reference to high-quality comparative studies, where available, and discussion of strengths as well as limitations of the currently available IOL technologies. Read More

View Article

Download full-text PDF

Source
http://www.e-tjo.org/text.asp?2019/9/1/4/252231
Publisher Site
http://dx.doi.org/10.4103/tjo.tjo_136_18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432854PMC
April 2019
1 Read

Refractive cataract surgery - what we were, what we are, and what we will be: A personal experience and perspective.

Authors:
Ming Chen

Taiwan J Ophthalmol 2019 Jan-Mar;9(1):1-3

Department of Surgery, Division of Ophthalmology, John A. Burns School of Medicine, University of Hawai'i at Mānoa Honolulu, Hawai'i 96813, USA.

View Article

Download full-text PDF

Source
http://dx.doi.org/10.4103/tjo.tjo_133_18DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432845PMC

Prevalence of childhood ocular morbidity in a peri-urban setting in Bangladesh: a community-based study.

Public Health 2019 Apr 12;170:103-112. Epub 2019 Apr 12.

National Institute of Ophthalmology and Hospital, Dhaka, Bangladesh. Electronic address:

Objectives: To test a model of integrated pediatric eye care delivery and examine the prevalence and factors associated with childhood ocular morbidity in a peri-urban setting in Bangladesh.

Study Design: Cross-sectional, population-based study.

Methods: The study was conducted in three phases among children aged ≤15 years. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.puhe.2019.02.026DOI Listing

Bifunctional Template-Induced VO@SiO Dual-Shelled Hollow Nanosphere-Based Coatings for Smart Windows.

ACS Appl Mater Interfaces 2019 Apr 16. Epub 2019 Apr 16.

School of Chemical and Environmental Engineering China University of Mining and Technology (Beijing) , Beijing 100083 , China.

Thermochromic vanadium dioxide (VO) as one of the most promising candidates for smart windows has attracted widespread attention in recent years. Excellent optical performances (luminous transmittance, T, and solar modulation efficiency, Δ T) of VO-based coatings are usually pursued as crucial issues. In the current work, we report an ingenious approach for the synthesis of VO@SiO dual-shell hollow nanospheres (DSHNs) and the preparation of DSHNs thermochromic coatings. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1021/acsami.8b22113DOI Listing

Highly tunable nonlinear response of Au@WS hybrids with plasmon resonance and anti-Stokes effect.

Nanoscale 2019 Apr 16. Epub 2019 Apr 16.

Key Laboratory of Artificial Micro- and Nano-structures of the Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, P. R. China.

We synthesize Au@WS2 hybrid nanobelts and investigate their third-order nonlinear responses mediated by a strong anti-Stokes effect. By using the femtosecond Z-scan technique and tuning the excitation photon energy (Eexc), we find the sign reversals of both nonlinear absorption coefficient β and nonlinear refractive index γ to be around 1.60 eV, which is prominently higher than the bandgap (1. Read More

View Article

Download full-text PDF

Source
http://xlink.rsc.org/?DOI=C8NR09946D
Publisher Site
http://dx.doi.org/10.1039/c8nr09946dDOI Listing
April 2019
1 Read

Quality of life after refractive surgery: ReLEx SMILE vs Femto-LASIK.

Clin Ophthalmol 2019 26;13:561-570. Epub 2019 Mar 26.

Krasnodar Branch of Fyodorov Eye Microsurgery, Federal State Institution, Krasnodar, Russia,

Purpose: The safety and effectiveness of complex myopic astigmatism correction using ReLEx SMILE or Femto-LASIK techniques have been well established. The purpose of the current study is to compare quality of life (QoL) outcomes following ReLEx SMILE or Femto-LASIK procedures in parallel with functional vision and anatomic outcomes of treated eyes.

Patients And Methods: This prospective, consecutive series included 118 patients, 18-43 years of age, out of which 56 underwent ReLEx SMILE and 62 underwent Femto-LASIK surgery for correction of myopic astigmatism. Read More

View Article

Download full-text PDF

Source
https://www.dovepress.com/quality-of-life-after-refractive-s
Publisher Site
http://dx.doi.org/10.2147/OPTH.S170277DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6440445PMC
March 2019
1 Read

Visual impairment and objectively measured physical activity and sedentary behaviour in US adolescents and adults: a cross-sectional study.

BMJ Open 2019 Apr 14;9(4):e027267. Epub 2019 Apr 14.

Department of Epidemiology, Medical University of Vienna, Austria, Vienna, Austria.

Objectives: To compare levels of physical activity and sedentary time in a representative sample of US adolescents and adults with and without visual impairment.

Design: Cross-sectional analyses were carried out using data from the National Health and Nutrition Examination Survey.

Participants: The study population consisted of 6001 participants (adolescents n=1766, adults n=4235). Read More

View Article

Download full-text PDF

Source
http://bmjopen.bmj.com/lookup/doi/10.1136/bmjopen-2018-02726
Publisher Site
http://dx.doi.org/10.1136/bmjopen-2018-027267DOI Listing
April 2019
1 Read
2.063 Impact Factor

High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications.

Nanomaterials (Basel) 2019 Apr 3;9(4). Epub 2019 Apr 3.

Institute of Chemical Physics, University of Latvia, 19 Raina Blvd., LV-1586 Riga, Latvia.

This study demonstrates a new, robust, and accessible deposition technique of metal nanoparticle arrays (NPAs), which uses nanoporous anodic alumina (NAA) as a template for capillary force-assisted convective colloid (40, 60, and 80 nm diameter Au) assembly. The NPA density and nanoparticle size can be independently tuned by the anodization conditions and colloid synthesis protocols. This enables production of non-touching variable-density NPAs with controllable gaps in the 20-60 nm range. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/nano9040531DOI Listing

Preparation of High Refractive Index Composite Films Based on Titanium Oxide Nanoparticles Hybridized Hydrophilic Polymers.

Nanomaterials (Basel) 2019 Apr 2;9(4). Epub 2019 Apr 2.

Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan.

Optical materials with high refractive index (n) have been rapidly improved because of urgent demands imposed by the development of advanced photonic and electronic devices such as solar cells, light emitting diodes (LED and Organic LED), optical lenses and filters, anti-reflection films, and optical adhesives. One successful method to obtain high refractive index materials is the blending of metal oxide nanoparticles such as TiO₂ and ZrO₂ with high n values of 2.1-2. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3390/nano9040514DOI Listing

COMBINED PHACOEMULSIFICATION SURGERY WITH MULTIFOCAL INTRAOCULAR LENS IMPLANTATION AND PARS PLANA VITRECTOMY FOR SYMPTOMATIC VITREOUS OPACITIES.

Retin Cases Brief Rep 2019 Apr 8. Epub 2019 Apr 8.

Cincinnati Eye Institute, Cincinnati, OH.

Purpose: To report surgical outcomes of combined vitrectomy for vitreous floaters and phacoemulsification surgery with multifocal intraocular lens implantation.

Methods: Retrospective, interventional, noncomparative case series of five eyes from five patients who underwent same-day combined phacoemulsification surgeries with apodized, diffractive multifocal intraocular lens implantation for cataract and pars plana vitrectomy for symptomatic vitreous opacities, that is, floaters. Primary outcomes were distance and near visual acuities, and resolution of symptoms. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1097/ICB.0000000000000873DOI Listing

Gold nanoholes fabricated by colloidal lithography: novel insights into nanofabrication, short-range correlation and optical properties.

Nanoscale 2019 Apr 15. Epub 2019 Apr 15.

Institute for Microelectronics and Microsystems, IMM-CNR, Via Monteroni, I-73100 Lecce, Italy.

Colloidal lithography is widely used as a low cost and large-area deposition approach, alternative to the conventional small-area expensive lithographic techniques, for the fabrication of short-range ordered sub-wavelength metallic nanostructures. This paper contributes to the understanding of the impact of the fabrication protocol of a colloidal mask on the optical and sensing properties of short range-ordered nanohole (NH) distributions fabricated by colloidal lithography in optically thin (20 nm thick) gold films. We consider polystyrene nanospheres (PS-NSPs) with a nominal diameter of 80 nm, electrostatically adsorbed from a salt-free colloidal solution onto a polydiallyldimethylammonium (PDDA) countercharged monolayer. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1039/c8nr09911aDOI Listing

Sub-micrometer resolution liquid level sensor based on a hollow core fiber structure.

Opt Lett 2019 Apr;44(8):2125-2128

Liquid level measurement in lab on a chip (LOC) devices is a challenging task due to the demand for a sensor with ultra-high resolution but miniature in nature. In this Letter, we report a simple, compact in size, yet highly sensitive liquid level sensor based on a hollow core fiber (HCF) structure. The sensor is fabricated by fusion splicing a short section of HCF between two singlemode fibers (SMFs). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1364/OL.44.002125DOI Listing

Study of fluid dynamics at the boundary wall of a microchannel by Bloch surface waves.

Opt Lett 2019 Apr;44(8):1932-1935

Understanding how a fluid flows at the boundaries when it is confined at the microscale/nanoscale is crucial for a broad range of engineering and biology applications. We propose an experimental technique based on Bloch surface waves sustained by a one-dimensional photonic crystal to evaluate the speed of the contact line, i.e. Read More

View Article

Download full-text PDF

Source
https://www.osapublishing.org/abstract.cfm?URI=ol-44-8-1932
Publisher Site
http://dx.doi.org/10.1364/OL.44.001932DOI Listing
April 2019
1 Read

Clinical Outcomes of Lifitegrast 5% Ophthalmic Solution in the Treatment of Dry Eye Disease.

Eye Contact Lens 2019 Apr 10. Epub 2019 Apr 10.

Division of Cornea and External Disease, Kellogg Eye Center (A.Y.T.), University of Michigan, Ann Arbor, MI; Department of Ophthalmology (S.F.P.), Duke University Eye Center, Durham, NC; and Division of Cornea and Refractive Surgery (P.K.G.), Department of Ophthalmology, Duke University Eye Center, Durham, NC.

Purpose: To evaluate the clinical characteristics, outcomes, and adverse reactions after the use of lifitegrast 5% ophthalmic solution for the treatment of patients with dry eye disease (DED).

Methods: Retrospective chart review was performed in 121 patients seen at the Duke Eye Center with DED who were prescribed lifitegrast 5% and seen for follow-up after treatment initiation. Charts were reviewed for meibomian gland dysfunction (MGD) grading, conjunctival and corneal staining scores, and tear breakup time (TBUT), as well as matrix metalloproteinase-9 (MMP-9) levels. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1097/ICL.0000000000000601DOI Listing
April 2019
1 Read

Orthokeratology With a New Contact Lens Design in Hyperopia: A Pilot Study.

Eye Contact Lens 2019 Apr 12. Epub 2019 Apr 12.

Group of Optics and Visual Perception (A.S.-G. and D.P.P.), Department of Optics, Pharmacology and Anatomy, University of Alicante, San Vicente del Raspeig (Alicante), Spain; Department of Optometry and Vision (L.B.-V.), Complutense University of Madrid, Madrid, Spain; and Department of Ophthalmology (D.P.P.), Vithas Medimar International Hospital, Alicante, Alicante, Spain.

Purpose: To evaluate the preliminary clinical outcomes of a new contact lens design for orthokeratology in hyperopia.

Methods: Prospective pilot study including 8 hyperopic eyes of 4 nonpresbyopic patients (24-44 years) undergoing orthokeratology with the Alexa H contact lens (Tiedra Pharmaceutical, Madrid, Spain), which is an aspheric pentacurve design. Visual, refractive, corneal topographic, and aberrometric changes were evaluated during a 1-month follow-up. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1097/ICL.0000000000000611DOI Listing
April 2019
1 Read

Long-term Outcomes of a New Surgical Technique for Corneal Remodeling in Corneal Ectasia.

J Refract Surg 2019 Apr;35(4):261-267

Purpose: To analyze the outcomes of a new technique (corneal remodeling) to treat corneal ectasia.

Methods: Sixty-nine cases that underwent corneal remodeling were analyzed. Anesthetic drops were instilled and a femtosecond laser platform was used to perform an 8-mm diameter keratectomy (180°, 270°, or 360°). Read More

View Article

Download full-text PDF

Source
https://www.healio.com/doiresolver?doi=10.3928/1081597X-2019
Publisher Site
http://dx.doi.org/10.3928/1081597X-20190226-02DOI Listing
April 2019
6 Reads

Deep Intrastromal Arcuate Keratotomy With In Situ Keratomileusis (DIAKIK) for the Treatment of High Astigmatism After Keratoplasty: 2-Year Follow-up.

J Refract Surg 2019 Apr;35(4):239-246

Purpose: To describe 2-year results of deep intrastromal arcuate keratotomy with in situ keratomileusis (DIAKIK) for the treatment of high astigmatism after keratoplasty.

Methods: This prospective study included 20 eyes from 20 patients presenting with high astigmatism after keratoplasty. All were treated by two-step femtosecond laser surgery, with two intrastromal arcuate keratotomies and a corneal flap, followed a few months later by excimer photoablation after reopening of the flap. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3928/1081597X-20190227-01DOI Listing
April 2019
1 Read

Functional Optical Zone and Centration Following SMILE and LASIK: A Prospective, Randomized, Contralateral Eye Study.

J Refract Surg 2019 Apr;35(4):230-237

Purpose: To compare centration and functional optical zone (FOZ) after small incision lenticule extraction (SMILE) and femtosecond laser-assisted in situ keratomileusis (LASIK).

Methods: In this prospective, randomized, single-masked, paired-eyed, clinical trial, 70 patients received SMILE in one eye and LASIK in the other eye for myopia and myopic astigmatism. FOZ was calculated using custom software on 3-month postoperative refractive power maps (Pentacam HR; Oculus Optikgeräte GmbH, Wetzlar, Germany). Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.3928/1081597X-20190313-01DOI Listing

Comparison of Wavefront-Optimized Ablation and Topography-Guided Contoura Ablation With LYRA Protocol in LASIK.

J Refract Surg 2019 Apr;35(4):222-229

Purpose: To compare the refractive outcomes and aberration data analysis of wavefront-optimized (WFO) ablation and topography-guided Contoura ablation (TGCA) (Contoura on the WaveLight laser; WaveLight GmbH, Erlangen, Germany) in patients who had laser-assisted in situ keratomileusis (LASIK) for myopia or myopic astigmatism.

Methods: In this comparative contralateral eye study, patients who underwent LASIK with TGCA in one eye and with WFO ablation in the fellow eye were analyzed. Aberration measurements and corneal topography were analyzed using the WaveLight Oculyzer II diagnostic device (Alcon Laboratories, Inc. Read More

View Article

Download full-text PDF

Source
https://www.healio.com/doiresolver?doi=10.3928/1081597X-2019
Publisher Site
http://dx.doi.org/10.3928/1081597X-20190304-02DOI Listing
April 2019
1 Read

Plasmonic Interferometer Array Biochip as a New Mobile Medical Device for Cancer Detection.

IEEE J Sel Top Quantum Electron 2019 Jan-Feb;25(1). Epub 2018 Aug 17.

Department of Electrical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.

We report a plasmonic interferometer array (PIA) sensor and demonstrate its ability to detect circulating exosomal proteins in real-time with high sensitivity and low cost to enable the early detection of cancer. Specifically, a surface plasmon wave launched by the nano-groove rings interferes with the free-space light at the output of central nano-aperture and results in an intensity interference pattern. Under the single-wavelength illumination, when the target exosomal proteins are captured by antibodies bound on the surface, the biomediated change in the refractive index between the central aperture and groove rings causes the intensity change in transmitted light. Read More

View Article

Download full-text PDF

Source
https://ieeexplore.ieee.org/document/8439005/
Publisher Site
http://dx.doi.org/10.1109/JSTQE.2018.2865418DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456910PMC
August 2018
1 Read

Effect of scan pattern on complete-arch scans with 4 digital scanners.

J Prosthet Dent 2019 Apr 11. Epub 2019 Apr 11.

Professor, Department of Oral Rehabilitation and Restorative Dentistry, College of Dental Medicine, Medical University of South Carolina, Charleston, SC. Electronic address:

Statement Of Problem: Complete-arch digital scans are becoming popular as digital dentistry is adopted for expanded clinical situations such as complete-arch prostheses, removable prostheses, extensive implant-supported treatment, and orthodontic aligners. Whether the scan pattern technique affects the trueness and precision of complete-arch scans and whether differences in accuracy exist among different scanners remain unclear. Furthermore, each manufacturer recommends a different scan pattern, but evidence of the superiority of the manufacturer's recommended pattern is lacking. Read More

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S00223913193015
Publisher Site
http://dx.doi.org/10.1016/j.prosdent.2019.02.008DOI Listing
April 2019
2 Reads

Optical properties of ice and snow.

Authors:
Stephen G Warren

Philos Trans A Math Phys Eng Sci 2019 Jun;377(2146):20180161

Department of Atmospheric Sciences, University of Washington , PO Box 351640, Seattle, WA 98195 , USA.

The interactions of electromagnetic radiation with ice, and with ice-containing media such as snow and clouds, are determined by the refractive index and absorption coefficient (the 'optical constants') of pure ice as functions of wavelength. Bulk reflectance, absorptance and transmittance are further influenced by grain size (for snow), bubbles (for glacier ice and lake ice) and brine inclusions (for sea ice). Radiative transfer models for clouds can also be applied to snow; the important differences in their radiative properties are that clouds are optically thinner and contain smaller ice crystals than snow. Read More

View Article

Download full-text PDF

Source
http://www.royalsocietypublishing.org/doi/10.1098/rsta.2018.
Publisher Site
http://dx.doi.org/10.1098/rsta.2018.0161DOI Listing
June 2019
2 Reads

Colonization of therapeutic contact lens by dematiaceous fungi.

Cont Lens Anterior Eye 2019 Apr 10. Epub 2019 Apr 10.

Department of Cornea and Refractive Services, Aravind Eye Hospital 1, Anna Nagar, Madurai, 625020, Tamil Nadu, India.

Purpose: To report 2 patients with colonization of therapeutic contact lens with dematiaceous fungi.

Methods: Case report.

Results: The first patient had a retained soft contact lens on an opaque cornea for 4 years with brownish black multiple colonies on the soft contact lens and culture grew Bipolaris spp. Read More

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S13670484183104
Publisher Site
http://dx.doi.org/10.1016/j.clae.2019.04.008DOI Listing
April 2019
1 Read

Theoretical investigation of size, shape, and aspect ratio effect on the LSPR sensitivity of hollow-gold nanoshells.

J Chem Phys 2019 Apr;150(14):144116

Department of Chemistry, Western Michigan University, Kalamazoo, Michigan 49008, USA.

The change in refractive index around plasmonic nanoparticles upon binding to biomolecules is routinely used in localized surface plasmon resonance (LSPR)-based biosensors and in biosensing platforms. In this study, the plasmon sensitivity of hollow gold (Au) nanoshells is studied using theoretical modeling where the influence of shape, size, shell thickness, and aspect ratio is addressed. Different shapes of hollow Au nanoshells are studied that include sphere, disk, triangular prism, rod, ellipsoid, and rectangular block. Read More

View Article

Download full-text PDF

Source
http://dx.doi.org/10.1063/1.5090885DOI Listing

Update on Intraocular Lens Calculation Formulas.

Ophthalmology 2019 Apr 10. Epub 2019 Apr 10.

In a study published last year we showed the Barrett was the single most accurate IOL formula overall. Herein we report on the outcomes of new or updated formulas when run against the same datasets. Achievement of a target refractive outcome has become an integral part of cataract surgery. Read More

View Article

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S01616420193028
Publisher Site
http://dx.doi.org/10.1016/j.ophtha.2019.04.011DOI Listing
April 2019
3 Reads

Transmit-Array, Metasurface-Based Tunable Polarizer and High-Performance Biosensor in the Visible Regime.

Nanomaterials (Basel) 2019 Apr 11;9(4). Epub 2019 Apr 11.

School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China.

There are two types of metasurfaces, reflect-array and transmit-array,-which are classified on the basis of structural features. In this paper, we design a transmit-array metasurface for -polarized incidence which is characterized by having a transmission spectrum with a narrow dip (i.e. Read More

View Article

Download full-text PDF

Source
https://www.mdpi.com/2079-4991/9/4/603
Publisher Site
http://dx.doi.org/10.3390/nano9040603DOI Listing
April 2019
4 Reads