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Indian Journal of Clinical and Experimental Ophthalmology


Screening of colour vision deficiency in school children of Wardha District


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Author Details: Neha R. Chandak, Sachin V. Daigavane, Surabhi R. Sharma

Volume : 3

Issue : 1

Online ISSN : 2395-1451

Print ISSN : 2395-1443

Article First Page : 80

Article End Page : 84


Abstract

Introduction: Colour vision in humans is trichromatic. Colour vision deficiency (CVD) occurs when one or more of cone types are absent, or present but defective. It is a common X-linked genetic disorder. However, most colour blind children remain undetected due to absence of proper screening. Therefore, this cross-sectional study was carried out to determine the prevalence of CVD, type of CVD and prevalence of each type among school children of Wardha District.
Materials and Methods: 850 school children in the age of 10-15 years were screened for CVD using Ishihara’s pseudoisochromatic test 38 plate edition.
Results: Of 850 school children, 18 children (2.1%) (95% confidence interval: 1.35-3.33) suffered from CVD. Prevalence rate for CVD was found to be higher in males (3.7%) than in females (0.4%). The overall trend of defects was: deuteranomaly > deuteranopia > protanomaly > protanopia. The prevalence of congenital dyschromatopsia in school children of Wardha District was comparable to prevalence rates across India.
Conclusion: Early diagnosis of congenital dyschromatopsia would allow for minimization of these problems, improvement of adaptation of children to their dysfunction, and, most importantly, for better planning of their professional future.

Keywords:
Colour vision deficiency, Dyschromatopsia, Ishihara, School children