Virtual colour vision gallery

Difficulties with colour perception, popularly known as 'colour blindness' affect millions of people, but significantly more men than women. Optometrists can test for these misperceptions. The result is not just of academic interest as defective colour vision can have important occupational safety implications.

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Explore the following pages in this virtual gallery

Colour 'blindness'

Our appreciation of nature, as much as fine art, is enhanced greatly by our human ability to perceive colours. Not everybody, however, sees all the colours of the visible spectrum in quite the same way, yet throughout history an ability to identify specific colours has had many important uses.

John Dalton - A Visual Error

The man who gave his name to colour blindness - 'Daltonism' - was neither an optician, nor a physician but a chemist. He donated his own eyes to colour vision science and the results of this altruistic act were very interesting, even if they disproved their donor's own theories.

Ishihara and other colour vision tests

Numbers, squiggles and the rest...

Colour vision test lanterns

This online exhibition is a contribution to the history of colour test lanterns which thus far has been little researched. At times it has been very important for certain workers to have demonstrably accurate colour vision, especially in the field of transport where safety signalling is encountered.