COMPARISION OF TWO PSEUDOISOCHROMATIC TEST FOR DETECTION OF COLOUR VISION DEFFICIENCY: A CROSSECTIONAL STUDY

DR. SOHAM S.PAL; DR. VEERENDRA B. ATNOOR

Volume : VIII, Issue : III, March - 2019

COMPARISION OF TWO PSEUDOISOCHROMATIC TEST FOR DETECTION OF COLOUR VISION DEFFICIENCY: A CROSSECTIONAL STUDY

Dr. Soham S. Pal, Dr. Veerendra B. Atnoor

Abstract :

BACKGROUND: Color vision is a function of three types of cone pigments which are present in retina. Any abnormality in these cone pigments may cause deficiency of color vision which is called as color vision deficiency. Our study was carried out to find out colour vision deficiency in secondary school children of solapur city. MATERIAL AND METHODS: Two pseudoisochromatic tests, namely, ishihara test and Richmond HRR test for testing colour vision deficiency was used to identify children suffering from CVD. Period of study was from august 2016 to July 2018. 5,000 school children in Solapur city irrespective of their gender/ background /socio economic status aged between 10–15 years were included in the study. RESULTS: Total number of students found out to be CVD according to Ishihara chart was 213 i.e. 04.26%, out of which 200 i.e. 06.19% were males and 13 i.e. 0.73% were females.CVD according to HRR chart was 215 i.e. 04.30%, out of which 202 i.e. 06.25% were males and 13 i.e. 0.73% were females. CONCLUSIONS: Prevalence rate of CVD was found to be more in males and by using HRR test was slightly higher than Ishihara test. Tritanopia was detected by only HRR test which could not be detected using Ishihara test.