Results 11 to 20 of about 200,462 (294)
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 +3 more
openaire +2 more sources
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
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 +15 more
doaj +1 more source
ADVANCED KERATOCONUS WITH LOW REFRACTIVE ERROR [PDF]
Egyptian Journal of Clinical Ophthalmology, 2018 In this report we are presenting a 28-year-old female with right keratoconus grade3 and leftkeratoconus grade 2 with low degree refraction (spherical equivalent in right eye = -2.25 and+0.75D in left eye).
Mostafa, E., Mounir, A.
doaj +1 more source
Prevalence of refractive errors among the school-going children in East Sikkim
Indian Journal of Ophthalmology, 2021 Purpose: Vision plays an important role in child's development for learning and communication. Uncorrected refractive error (URE) has become a major challenge to health care policy makers especially in school going children.
Karma Loday Bhutia +3 more
doaj +1 more source
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 +10 more
doaj +1 more source
Prevalence and causes of functional low vision in school-age children: results from standardized population surveys in Asia, Africa, and Latin America. [PDF]
, 2008 PURPOSE: Data on the prevalence and causes of functional low vision (FLV) in adults and children are lacking but are important for planning low-vision services.
Ellwein, Leon B +2 more
core +1 more source
Stereoacuity after photorefractive keratectomy in myopia
Journal of Current Ophthalmology, 2016 Purpose: Stereopsis, as a part of visual function, is the ability of differentiating between the two eyes' views (binocular disparity), due to the eyes' different positions.
Siamak Zarei-Ghanavati +4 more
doaj +1 more source
Assessment of Refractive Status of 5-15 Years Old Children Attending Government Schools of Rural Agra [PDF]
Healthline, 2022 Introduction: In children uncorrected refractive errors have a profound effect on educational and psychosocial development hence it is necessary to estimate the prevalence both at the community and at the school level to aid planning and implementation ...
Himanshu Kumar Yadav +4 more
doaj +1 more source
Application of big-data for epidemiological studies of refractive error.
PLoS ONE, 2021 PurposeTo examine whether data sourced from electronic medical records (EMR) and a large industrial spectacle lens manufacturing database can estimate refractive error distribution within large populations as an alternative to typical population surveys ...
Michael Moore +5 more
doaj +1 more source