XXXX in schoolchildren.

@entity1 @entity940 @entity227 @entity16479 @entity3467
OBJECTIVE: To assess @entity16479 prevalence and associated factors in schoolchildren aged 6-16. METHODS: This was a cross-sectional study of all @entity1 attending the first to eighth grades at two public schools in the urban region of a medium-sized town in Southern Brazil between April and December 2012. A questionnaire on socioeconomic and cultural matters was answered by parents, while the @entity1 answered a questionnaire on @entity16479 -related symptoms. The @entity1 underwent a complete visual function examination, including measurement of visual acuity, refraction test, cover test, stereopsis, heterophoria assessment, near point of convergence, and accommodative convergence/accommodation ratio. RESULTS: @entity16479 prevalence was 24.7% in a total sample of 964 @entity1 . Visual acuity of 20/25 or better in both eyes was found in 92.8% of the @entity1 . The stereopsis test was normal in 99.4% of them, and some kind of strabismus was found in 3.5%. About 37.8% had @entity940 , 71.6% had mild @entity3467 , 13.6% had moderate @entity3467 , and 6.1% were myopic. Near point of convergence was abnormal in 14.0% of the @entity1 , and the accommodative convergence/accommodation ratio was found to be altered in 17.1% of them. CONCLUSION: @entity1 and adolescents have expressive prevalence of @entity16479 . The prevalence of visual function alterations does not differ from the general population, and, therefore, they are not prerequisites. It is very important that its mechanisms and risk factors be better defined. Health professionals need to be on the lookout for complaints of @entity227 because of its potential to influence learning and school performance.
