Prevalence of Vision Impairment and Refractive Error in School Children in Ba Ria – Vung Tau Province, Vietnam
The purpose of this study was to assess the prevalence of vision impairment and refractive error in school children 12–15 years of age in Ba Ria – Vung Tau province, Vietnam.
This was a cross sectional school based study conducted with 2238 secondary school children selected by stratified multistage cluster sampling method.
The prevalence of uncorrected visual impairment due to refractive error in one or both eyes was 21.4%.
The causes of vision impairment were refractive error in 92.7%, amblyopia in 2.2%, cataract in 0.7%, retinal disorders in 0.4%, other causes in 1.5% and unexplained causes in the remaining 2.6%.
The prevalence of vision impairment due to myopia in either eye was 20.4%, hyperopia was 0.4% and emmetropia with astigmatism was 0.7%.
Vision impairment due to myopia was associated with higher school grade and increased time spent reading and working on a computer.
Uncorrected RE (myopia in particular) is the most common cause of VI in secondary school children in Vietnam indicating the need for RE services.