Comparative Study of Ishihara Pseudoisochromatic Color Plate and Color Plate Made by “The Institute for the Promotion of Teaching Science and Technology” for Color Blindness

Wanicha Chuenkongkaew, M.D.,
Pittaya Pamonvaechawan, M.D.,
Jutalai Tanterdtham, M.D.,
Niphon Chirapapaisan, M.D.

ABSTRACT : To determine the effectiveness between the Ishihara pseudoisochromatic color plate and the color plate made by the institute for the Promotion of Teaching Science and Technology for color vision test, 96 congenital or acquired color blindness and 96 normal subjects were examined with 13 plate-selected series of both types of color plates. The results showed no statistically significant difference between the Ishihara and the Institrte color plates for color vision test in normal subjects and color blindness individuals. The sensitivity and specificity of the Institute color plate were similar to those of the Ishihara plate. The comparison of each correspondent plate between the Ishihara and Institute color vision test obtained the same sensitivity and specificity in all but 4 plates (figure 5, 3, 15, and 7). The small sample size, small number of plates in each series and examination by many ophthalmologists were the disadvantages of this study. We suggest that the Institute plates can be used for self-assessment of color deficiency.

The J Ophthalmol 2001 ; January-June 15(1) 39-45.