Department of Ophthalmology

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Browsing Department of Ophthalmology by Subject "Color vision"

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    Open Access
    Prevalence and Pattern of Congenital Color Vision Defect among Public Secondary School Students in Kosofe Local Government Area, Lagos, Nigeria
    (Nigerian Quarterly Journal of Hospital Medicine, 2016) Salami, M.O; Aribaba, O.T; Musa, K.O; Rotimi-Samuel, A; Onakoya, A.O; Akinsola, F.B
    Background: Congenital color vision defect is one of the commonest genetic defects. It affects daily and professional living. Objective: This study was conducted to determine the prevalence of color vision defects among public secondary school students in Kosofe Local Government Area, of Lagos State with a view to providing data that could be useful for advocacy to institute regular school screening. Materials and Methods: A descriptive cross sectional study conducted among public school students in all the seven public secondary schools in Kosofe Local Government Area of Lagos State. Sample size was determined by Leslie-Kish formula. Students were selected using multistage sampling technique. Visual acuity was determined using the literate Snellen’s chart. Color vision status was screened using lshihara pseudo-isochromatic test and further categorization of degree of severity of color vision defects was determined using of Farnsworth- Munswell D-15. Results: Five hundred and forty students were examined with a mean age of 13.7+1.8 years (ranging 9-20years). There were 307 females and 233 males, with a female to male ratio of 1.3:1. The prevalence of color vision defects among respondents was 1.9% (10 students). There were 8 males and 2 females with color vision defects with a statistically significant difference between gender (p=0.02). There were 8 students with deuteranomaly and 2 students with protanoamaly but there was no tritan defect detected. Conclusion: The prevalence of color vision defect in this study is within the range of prevalence values reported in Nigeria. Color vision screening programs should be integrated into the pre-existing eye screening programs. Keywords: Color vision, defects, students, Nigeria