Konjenital Renk Görme Bozukluğunun Hardy-Rand-Rittler Psödoizokromatik Testi ile Tespiti

Abstract

Objective: To screen, categorize and grade the severity of congenital color vision deficiency (CVD) by using Hardy-Rand-Rittler (HRR) pseudoisochromatic test plates and to detect the state of awareness of people about their abnormal color vision. Material and Methods: 2211 consecutive subjects aged between 15-45 years were recruited for the study. All patients underwent a color vision test by using HRR 4th edition pseudoisochromatic test plates. Both eyes were tested separately and the data of the right eyes were used for statistical analysis. The patients detected to have CVD were also asked if they were previously aware of their abnormal color vision. Results: Abnormal color vision was encountered in 59 out of 993 males (5.9%) and 4 out of 1218 females (0.3%). Congenital CVD cases were deutan in 47 (74.6%), protan in 11 (17.5%) and unclassified in 5 (7.9%) subjects. Five (7.9%) of the CVD subjects were classified as having mild, 21 (33.4%) having medium and 37 (58.7%) having strong color deficiency. Nineteen subjects (30.2%) were previously unaware of their abnormal color vision. The awareness of abnormal color vision was significantly associated with male gender and increased severity of the disease. Conclusion: HRR test may be used to detect, classify and grade severity of CVD. Approximately one third of the patients with CVD were previously unaware of their abnormal color vision. Female subjects and patients with mild CVD were more frequently unaware of their color vision problem.