Ishihara Test For Color Blindness Features:
Accepted by leading authorities world wide as a simple and accurate method for discovering Congenital Color Blindness (Present at Birth) and Red-Green Blindness, each in two forms, Complete and Incomplete.
Includes four special plates for tests to determine the kind and degree of defect in color vision.
Makes use of the peculiarity that in Red-Green Blindness, blue and yellow appear remarkably bright compared with red and green.
Consist of a number of colored plates.
On each plate is printed a circle made of many different sized dots of slightly different colors, spread in a random manner.
Within the dot pattern, and differentiated only by color, is a number. What, or even if, a number is visible indicates if and what form of Color Blindness the viewer has.
10, 14, 24 and 38 Plate Test Books Available
Color Plates are Encased in Specially Designed Album-Type Books for Ease of Handling
For Congenital and Red/Green Color Blindness
Detailed Instructions Included
What is Color Blindness?
Color Blindness (Color Vision Deficiency) is a condition in which certain colors cannot be distinguished, most commonly due to an inherited condition.
Red/Green color blindness is by far the most common (99%) form and causes problems in distinguishing reds and greens. Another color deficiency, Blue/Yellow, also exists but is rare (1%). At this time there is no universally available test for it.
There is no treatment for Color Blindness, nor is it usually the cause of any significant disability. However, it can be very frustrating for individuals affected by it.
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