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ABSTRACT
Color vision deficiency is a condition wherein a person is unable to distinguish certain colors or shades of colors to some degree. Males are more frequently affected because it is a recessive trait linked to the X chromosome. Color-vision deficiency may be congenital (inherited) or acquired. Congenital or inherited color defects are non-pathologic, incurable, and constant throughout life. Acquired color defects are usually a result of degenerative diseases, toxic effect of drugs, trauma, and aging. A commercial driver is someone who has been trained and certified to drive a commercial vehicle professionally. The study was carried out within a period of two months. With a population of 100 commercial drivers in Benin metropolis. Ishihara color plate test was used for this experiment. The study aimed at investigating the prevalence of Color vision deficiency among commercial drivers in Benin. Data was analyzed using the paired T-test and ANOVA. 83% (n=83) of the subjects achieved a score of 25, signifying normal color vision while two subjects exhibited a score of zero in their right eye. Similarly, 81% (n=81) achieved a score of 25 while four subjects scored zero in their left eye showing a significant prevalence (p<0.05) of color vision deficiency. In conclusion, the results of the study showed that color vision deficiency is prevalent among commercial bus driver. We therefore recommend a regular screening for color vision deficiency among drivers in Benin Metropolis and in other states of Nigeria.
