Prevalence of refractive error in school children

Prevalence of refractive error in school children of Karachi.

OBJECTIVE To find out the prevalence of refractive error and the eye morbidity in the school children and the associated factors. METHODS One thousand students were selected from different schools of Karachi adopting two stage sampling technique. List of schools was obtained from Board of Secondary Education and 20 schools were randomly selected from the list in the five districts of Karachi ...

Prevalence of heterophoria and associations with refractive error, heterotropia and ethnicity in Australian school children.

AIMS To establish the prevalence of heterophoria and its association with refractive error and ethnicity in a population-based study of Australian schoolchildren. METHODS The Sydney Myopia Study is a stratified, random cluster (school-based) sample of 4093 students (examined: 2003-2005). Two samples aged 6 (n=1692) and 12 years (n=2289) without heterotropia were included. Prevalent heterophoria...

Refractive error in school children in Campinas, Brazil.

Prevalence of refractive error in Singaporean Chinese children: the strabismus, amblyopia, and refractive error in young Singaporean Children (STARS) study.

PURPOSE To determine the prevalence of refractive error types in Singaporean Chinese children aged 6 to 72 months. METHODS The Strabismus, Amblyopia and Refractive Error in Singaporean Children (STARS) is a population-based study in southwest Singapore. Door-to-door recruitment of participants was used, with disproportionate random sampling in 6-month increments. Parental questionnaires were ...

Prevalence of Amblyopia and Refractive Errors Among Primary School Children.

PURPOSE To determine the prevalence of amblyopia and refractive errors among 7 to 12-year-old primary school children in Tehran, Iran. METHODS This population-based cross-sectional study included 2,410 randomly selected students. Visual acuity was tested using an E-chart on Yang vision tester. Refractive errors were measured by photorefractometry and cycloautorefraction. Strabismus was checke...