A study of Refractive Errors in a Primary School in Cotonou, Benin

  • The purpose of this study is to determine the epidemiologic aspects and the degree of severity of different refractive errors in primary schoolchildren ranging from 4 to 16 years of age in a public primary school in Cotonou, Benin. The refraction was evaluated for any visual acuity lower than or equal to 0.7.

  • The study included 1057 schoolchildren average age was 8.5+/-2.6 years with a slight predominance of females (51.8%).

  • The prevalence of refractive error was 10.6% and astigmatism accounted for the most frequent refractive anomaly (91.9%).

  • Myopia and the hyperopia were associated with astigmatism in 29.4% and 16.1% of the cases, respectively. The age bracket from 6 to 11 years accounted for the majority of refractive errors (75.9%), without age and sex being risk factors.

  • The average vision of the ametropic eye was 0.61, with a clear predominance of slight refractive errors (89.3%) and particularly of low-level simple astigmatism (45.5%).

  • The study concluded that the relatively low prevalence of refractive error observed does not obviate the need for implementing actions to improve the ocular health of schoolchildren.

Publication date

February 22, 2019


Journal Français D'Ophtalmologie


Sounouvou I, Tchabi S, Doutetien C, Sonon F, Yehouessi L, Bassabi SK.
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