Results 1 to 10 of about 1,813,871 (298)

Refractive error blindness

Bulletin of the World Health Organization, 2001
Recent data suggest that a large number of people are blind in different parts of the world due to high refractive error because they are not using appropriate refractive correction.
Dandona Rakhi, Dandona Lalit
doaj   +3 more sources

Refractive error maps: A predictive tool for refractive error progression. [PDF]

Ophthalmic Physiol Opt
Abstract Purpose To investigate the influence of axial length on different ocular parameters and create a predictive tool for refractive error progression. Methods Two eye models were used to simulate refractive ...
Debowy F, Pierscionek B.
europepmc   +6 more sources

Effective refractive error coverage and quality gaps in Bhutan: evidence from rapid assessment of refractive error [PDF]

BMC Public Health
Background Uncorrected refractive errors (URE) and presbyopia are leading causes of visual impairment (VI) globally. Bhutan currently lacks population-based data on adult refractive error, hindering efforts to meet WHO’s 2030 targets for effective ...
Indra Prasad Sharma, Kovin Shunmugam Naidoo, Khathutshelo Percy Mashige, Nor Tshering Lepcha   +3 more
doaj   +2 more sources

Improving Access to Refractive Services in Adults: A Health Examination Center-Based Model

Frontiers in Medicine, 2021
Purpose: To assess the potential of a health examination center-based screening model in improving service for uncorrected refractive error.Methods: Individuals aged ≥18 years undergoing the routine physical examinations at a tertiary hospital in the ...
Haishuang Lin, Haishuang Lin, Haishuang Lin, Jing Sun, Nathan Congdon, Nathan Congdon, Meiping Xu, Shanshan Liu, Yuanbo Liang, Yuanbo Liang, Yuanbo Liang, Hailin Wang, Shaodan Zhang, Shaodan Zhang, Shaodan Zhang, Shaodan Zhang   +15 more
doaj   +1 more source

Refractive errors [PDF]

Deutsches Ärzteblatt international, 2016
All over the world, refractive errors are among the most frequently occuring treatable distur - bances of visual function. Ametropias have a prevalence of nearly 70% among adults in Germany and are thus of great epidemiologic and socio-economic relevance.In the light of their own clinical experience, the authors review pertinent articles retrieved by a
Ulrich, Schiefer, Christina, Kraus, Peter, Baumbach, Judith, Ungewiß, Ralf, Michels   +4 more
openaire   +2 more sources

Agreement Between Swept-source Optical Coherence Tomography and Rotating Scheimpflug Camera in Measurement of Corneal Parameters in Normal and Keratoconic Eyes

Journal of Ophthalmic & Vision Research, 2023
Purpose: This study aimed to assess the agreement between topographic indices of healthy subjects and keratoconus (KCN) patients using a swept-source optical coherence tomography (SS-OCT CASIA2) versus a Scheimpflug camera (Pentacam). Methods: 40 eyes of
Hamed Ghassemi, Mehran Zarei-Ghanavati, Mina Khastavan, Mehrnaz Atighehchian, Abbas Azimi Khorasani, Golshan Latifi   +5 more
doaj   +1 more source

Calculating the error in refractive error [PDF]

Eye, 2011
To demonstrate a quick way of calculating the optical difference between two refractions using vector analysis, and to express this as a score for examination purposes.An existing formula is applied, converted to a defocus equivalent, and then converted to a score.
R H, Taylor, R B, Ellingham, S, Subramaniam, L A, Wakely   +3 more
openaire   +2 more sources

Refractive Error among Children Visiting the Department of Paediatric Opthalmology of a Tertiary Eye Care Center

Journal of Nepal Medical Association, 2023
Introduction: Refractive error is the inability of eyes to focus clearly on images. Visual impairment due to refractive error has a major impact on children's education and daily activities.
Govind Gurung, Krishna Kant Gupta
doaj   +1 more source

Prevalence of visual impairment due to refractive error among children and adolescents in Ethiopia: A systematic review and meta-analysis.

PLoS ONE, 2022
IntroductionGlobally, the prevalence of refractive error was 12%, and visual impairment due to refractive error was 2.1%. In sub-Saharan Africa, the prevalence of refractive error and visual impairment due to refractive error was 12.6% and 3.4 ...
Daniel Atlaw, Zerihun Shiferaw, Biniyam Sahiledengele, Sisay Degno, Ayele Mamo, Demisu Zenbaba, Habtamu Gezahegn, Fikreab Desta, Wogene Negash, Tesfaye Assefa, Mujib Abdela, Abbul Hasano, Gashaw Walle, Chala Kene, Degefa Gomora, Vijay Kumar Chattu   +15 more
doaj   +1 more source

Comparison of the new self-contained darkroom refractive screener versus table-top autorefractor and cycloplegia retinoscopy in detecting refractive error

BMC Ophthalmology, 2023
Purpose By comparing the results of the new self-contained darkroom refractive screener (YD-SX-A) versus table-top autorefractor and cycloplegic retinoscopy, to evaluate the performance of the YD-SX-A in detecting refractive error in children and ...
Xianxian Wei, Lili Li, Li Jiang, Haiyan Lu, Huiyao Huang, Dedong Zhong, Liang Pan, Diefeng Wei, Yun Han, Hong Lin, Qi Chen   +10 more
doaj   +1 more source