Vision Testing
Ishihara colour charts
A confusion test for colour deficiency, principally inherited defects of the red-green type. A very sensitive test, so will fail those with very minor defects. Provides little indication of occupational colour matching ability; does not test blue/yellow vision.
Key features
- Confusion test for red-green colour deficiency
- Highly sensitive; detects minor defects
- Screens inherited colour vision defects
- Does not test blue/yellow vision
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