100 cases (99 male, 1 female) with defective co1or vigion but good vigual acuity, and no retinal diseases that could be detected by screening with Iehihara's test were ge1ectgd from 2708 cases (maIe 2382, female 326) that had undergone a physicaI examination at National Semil Hogpital. The 100 cages wgre examined using a printed sample of plates including Ishihara-Ohuma's test and Hahn's double 15-hue test. After thig test, the 100 cages were examined using Nagel's anomaloscope. The anomaloscope using the wavelengths 670nm and 546nm to mathch 589nm is the most accurate means of diagnosing defects of red and green vision. Results of examination in classifing the types of color defects using the plates of both Ishihara-Oguma's test and the Hahn's doume 15-hue test as well as the Nagel's anomaloscope were as follows: 1. In the total of 2708 persons examined, there were 2382 males and 326 females from this 100 cases of congenital color defects were discovered 99(4.16%) males and female 1(0.31%). 2. The classification and rates of types of congenital color defects were as followg: 99 ma1eg were classified with 12(12.1 %) protanopia, 35(35.4%) deutanopia, 9(9.1 %) protanomalia and 43 (43.4 %) deuteranomalia, on the other hand one ferna1e was found out deuteranomalia.
Classification ; Female ; Hand ; Humans ; Male ; Mass Screening ; Retinal Diseases