The handicap of abnormal colour vision

Reflections on abnormal colour vision and theories of colour.

Historically, physiology is the daughter of pathology. Healthy people struggling with an overwhelming nature had no time to bother with the workings of their organs, and doctors-naturallywere always preoccupied with disease. For them the argument from malfunction to normal function has become almost second nature and the successes of this approach in such fields as neurology, endocrinology, and...

Five cricketers with abnormal colour vision.

Five cricketers with abnormal colour vision, all of whom had mild deuteranomaly, reported occasions when they had lost sight of the ball when the background was the green grass of the playing field or the green of grassy banks or trees surrounding the playing field. While these five cricketers demonstrate that mild deuteranomaly does not preclude playing cricket successfully at a competitive le...

Colour-Vision and Colour-Blindness

Colour vision

The immense range of colours that we see belies the relative simplicity of the system underlying colour vision. We see colours because each of the three distinct types of cone photoreceptor in our retinae is sensitive to a different range of wavelengths of light. The L, M and S cones, colloquially called red (R), green (G), and blue (B), are selective for long, middle and short wavelengths, res...

The Colour Vision of Fish

At one time during the past few months the writer's attention was called to the following statement made in January I926 by an eminent surgeon: "In fishes a falci-ft \form ligament is attached to the back of the lens and to the back of the eye for N /fX,E1 focusing. They have no color vision. This fact will be disputed by those who sell q .; ~~~artificial flies at high prices.""5 A subse-"~ Xe\...