Ishihara Test

Feature:

 This series of plates is designed to provide a test which gives a quick and accurate assessment of colour vision deficiency of congenital origin .This is the commonest form of colour vision disturbances.

 The mark X shows that the plate cannot be read. Blank space denotes that the reading is indefinite. The numerals in parenthesis show that they can be read but they are comparatively unclear.

 The mark X shows that the plate cannot be read. Blank space denotes that the reading is indefinite. The color line in parenthesis show that they can be follow but they are comparatively not easy to follow.