title: [Astigmatism among students ranging from 6 to 18 years of age].
abstract: OBJECTIVE
  To determine the prevalence of astigmatism among students ranging from 6 to 18 years of age.
  
  
  METHODS
  5023 students from elementary schools, junior high schools and high schools, aged 6-18 years were examined. Measurements of visual acuity as well as retinoscopy after cycloplegia have been carried out. The data was analyzed using chi-square test, and the coefficients of rang Spearman's correlation were calculated.
  
  
  RESULTS
  It was found that 4% of the students, aged from 6 to 18 suffers from astigmatism. No influence of the students' age on the prevalence of astigmatism was observed. It was found that astigmatism occurs more frequently among boys rather than girls.
authors.affiliation: Katedry i Kliniki Okulistyki z Zakładem Patofizjologii Narzadu Wzroku Pomorskiej Akademii Medycznej w Szczecinie.
authors.forename: Damian
authors.initials: D
authors.lastname: Czepita
authors.forename: Wojciech
authors.initials: W
authors.lastname: Gosławski
authors.forename: Artur
authors.initials: A
authors.lastname: Mojsa
mesh_terms: D001251:Astigmatism / Q000175:diagnosis / Q000453:epidemiology*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D011044:Poland / Q000453:epidemiology; D015995:Prevalence; D042262:Retinoscopy; D014792:Visual Acuity