Results 21 to 30 of about 3,196,627 (365)

Prevalence of refractive errors, uncorrected refractive error, and presbyopia in adults in India: A systematic review

open access: yesIndian Journal of Ophthalmology, 2019
Purpose: The objective of this review is to estimate the prevalence of refractive errors, uncorrected refractive error (URE), and uncorrected presbyopia in adults aged ≥30 years in India.
S. Sheeladevi   +5 more
semanticscholar   +1 more source

Prevalence of refractive errors in children in India: a systematic review

open access: yesClinical and experimental optometry, 2018
Uncorrected refractive error is an avoidable cause of visual impairment which affects children in India. The objective of this review is to estimate the prevalence of refractive errors in children ≤ 15 years of age.
S. Sheeladevi   +5 more
semanticscholar   +1 more source

Part-time versus full-time occlusion therapy for treatment of amblyopia: A meta-analysis

open access: yesJournal of Current Ophthalmology, 2017
Purpose: To compare full-time occlusion (FTO) and part-time occlusion (PTO) therapy in the treatment of amblyopia, with the secondary aim of evaluating the minimum number of hours of part-time patching required for maximal effect from occlusion. Methods:
Negareh Yazdani   +5 more
doaj   +1 more source

Effect of Dry Eye Disease on Central Corneal Thickness and Corneal Topometric Indices Measured by Scheimpflug Tomography

open access: yesActa 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

Refractive errors among Saudi college students and associated risk factors

open access: yesClinical Ophthalmology, 2019
Objectives To determine the prevalence of refractive errors among freshman students of Imam Abdulrahman Bin Faisal University (IAU), and to examine the relationship of near-work activities and outdoor activities with refractive errors.
Bayan A Alsaif   +4 more
semanticscholar   +1 more source

ERRORS OF REFRACTION. [PDF]

open access: yesJAMA: 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

Prevalence and Risk Factors of Amblyopia among Refractive Errors in an Eastern European Population

open access: yesMedicina, 2018
Background and objective: Amblyopia is the leading cause of visual impairment in children and adults and is very common during childhood. The aim of this study was to identify the prevalence and the risk factors of amblyopia in a pediatric population ...
V. Mocanu, Raluca Horhat
semanticscholar   +1 more source

Comparison of cyclopentolate versus tropicamide cycloplegia: A systematic review and meta-analysis

open access: yesJournal 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

Association between Refractive Error Types and Asthenopia in Primary School Students

open access: yesMajalah 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

Metrology of Complex Refractive Index for Solids in the Terahertz Regime Using Frequency Domain Spectroscopy [PDF]

open access: yes, 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

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