Ishihara test

a test for color vision deficiency that uses a series of pseudoisochromatic plates on which numbers or letters are printed in dots of primary colors surrounded by dots of other colors; the figures are discernible by patients with normal color vision.

Chemwatch
Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.