Results 21 to 30 of about 128,271 (341)
Acta Medica Iranica, 2023 To evaluate the effect of dry eye disease (DED) on the central corneal thickness and anterior corneal surface irregularity parameters using Scheimpflug tomography.
Masoud Siyahkamari +8 more
doaj +1 more source
Association between Refractive Error Types and Asthenopia in Primary School Students
Majalah Kedokteran Bandung, 2021 Refractive error is a condition in which the cornea and lens fail to focus the light, resulting in reduced visual efficiency. Twelve million children are experiencing refractive errors worldwide and uncorrected refractive errors in children have been ...
Vanessa Kuswanto +2 more
doaj +1 more source
JAMA: The Journal of the American Medical Association, 1895 These eighteen propositions will assist the beginner to more readily understand the many pages treating of the same subjects in all our text-books. With a second lecture on the lenses which correct the errors of refraction, and a third lecture on the frames which hold the lenses which correct the errors of refraction, we will have completed the "House
openaire +2 more sources
Comparison of cyclopentolate versus tropicamide cycloplegia: A systematic review and meta-analysis
Journal of Optometry, 2018 Purpose: The aim of the present meta-analysis is to compare the efficacy of cyclopentolate and tropicamide in controlling accommodation during refraction. Methods: A comprehensive literature search was performed in PubMed, Scopus, Science direct and Ovid
Negareh Yazdani +4 more
doaj +1 more source
Metrology of Complex Refractive Index for Solids in the Terahertz Regime Using Frequency Domain Spectroscopy [PDF]
, 2018 Frequency domain spectroscopy allows an experimenter to establish optical properties of solids in a wide frequency band including the technically challenging 10 THz region, and in other bands enables metrological comparison between competing techniques ...
Chick, Steven +3 more
core +2 more sources
Refractive errors among medical students in Jordan: prevalence, types and possible risk factors
Future Science OA, 2023 Aim: This study aims to determine the prevalence of refractive errors among medical students in Jordan. Materials & methods: Cross-sectional model through an online questionnaire was conducted.
Asem A Alqudah +2 more
doaj +1 more source
NETRA: Interactive Display for Estimating Refractive Errors and Focal Range [PDF]
, 2010 We introduce an interactive, portable, and inexpensive solution for estimating refractive errors in the human eye. While expensive optical devices for automatic estimation of refractive correction exist, our goal is to greatly simplify the mechanism by ...
Ankit Mohan +9 more
core +1 more source
The prevalence of uncorrected refractive errors in underserved rural areas
Journal of Current Ophthalmology, 2017 Purpose: To determine the prevalence of uncorrected refractive errors, need for spectacles, and the determinants of unmet need in underserved rural areas of Iran.
Hassan Hashemi +4 more
doaj +1 more source
Prevalence and Burden of Refractive Errors at National and Sub-national Levels in Iran
Journal of Ophthalmic & Vision Research, 2022 Purpose: To estimate the prevalence, burden of refractive errors and their associated trend from 1990 to 2018 and geographic inequalities in Iran. Methods: Data regarding the epidemiology of refractive errors was extracted from three different sources ...
Seyed Mohammadi +6 more
doaj +1 more source
Agreement between methods of retinoscopy, conventional subjective refraction and fogging subjective refraction [PDF]
Reviews in Clinical MedicinePurpose: to compare the refractive error measurements achieved through three distinct techniques: retinoscopy, subjective method, and the subjective fogging method. Methods: Participants included 223 young adults aged 18 to 36 years (mean age: 25.63±5.31)
Atefeh Kebriaei +6 more
doaj +1 more source