Abstract
ObjectiveColour vision deficiency is the commonest disorders of vision and undiagnosed colour vision defect could pose a handicap to the performance of an affected student. The prevalence of colour blindness varies in different geographical area and ethnicity. Hence, a cross sectional study was conducted among school children in Gurage Zone, Southern Ethiopia from April 15 to June 20, 2018. Socio-demographic data was collected on a face to face interview using structured questionnaire. All study participants underwent color vision evaluation using Ishihara’s pseudo isochromatic test 38 plate editions. Data analysis was done using SPSS version 23.ResultsA total of 844 (471 boys and 373 girls) school children were screened for colour vision. The overall prevalence of colour vision deficiency was 4.1%, comprised of 3.6% in boys and 0.6% in girls. Out of 35 color blind subjects, 15 (42.9%) and 20 (57.1%) were the victims of protan and deutan defects respectively. Majority of the colour blind subjects were not aware of their colour vision status. Hence, the study concluded that the prevalence of colour vision deficiency in our study is significant and colour vision screening among school should be performed.
Highlights
Colour vision deficiency (CVD) or colour blindness, is the inability or decreased ability to distinguish different colours under normal lighting conditions [1]
A total of 844 (471 boys and 373 girls) school children were screened for colour vision
The study concluded that the prevalence of colour vision deficiency in our study is significant and colour vision screening among school should be performed
Summary
A total of 844 (471 boys and 373 girls) children from 3 randomly selected primary schools were screened with a response rate of 99.3%. It was noted that among the study participants, 35 (4.1%) students were found to have colour deficient. Out of those students with CVD, 15 (42.9%) and 20 (57.1%) were classified as having protan and deutan defects, respectively. The prevalence of protan and deutan defects were higher among males as compared to female children (Fig. 1). The gender based differences in the prevalence of color vision deficiency was found to be statistically significant (p < 0.001), with a higher prevalence. There was statistically significant difference in CVD across religion (p = 0.039) in which Muslim children had a higher percentage of CVD than others (Table 2)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
