Colour vision is the ability to distinguish objects based on the wavelength of light they

emit,reflect or transmit. Inability to distinguish different colours is colour vision

deficiency. The aim of the study is to determine the prevalence of colour vision

deficiency among school children in Hyderabad district. The present study was

conducted under National School Eye Screening Programme .Total 13,149 school

children were screened consisting of 6484 (49.31%) girls and 6665 (50.68%) boys.

Among them 118 (0.89%) students were found to have colour vision deficiency.

Prevalence rate for CVD was found to be higher in males 88.93% than girls 11.04%.

Diagnosis of congenital colour  vision deficiency in school children helps in adaptation of

children to their dysfunction and better planning of their professional future.