PSYCH 1XX3 Lecture Notes - Lecture 6: Color Blindness, Visual Acuity, Chromate And Dichromate
Document Summary
One interesting case where a woman was colour blind in one eye, but not the other. For the colour blind eye, all wavelengths between 500 nm and 700 nm appeared to be the same shade of yellow (roughly 570 nm) in her normal eye. When her colour blind eye was presented with wavelengths between 400 nm and 500 nm, her normal eye perceived them as the same bluish colour of around 470 nm. So this woman was red-green colour blind in one eye and only able to see blues, yellows and shades of grey. Although colour blindness is sometimes caused by an injury to the colour detecting regions of the visual cortex by a stroke, tumour, or head trauma, it is usually an inherited condition. Genetic case is much more frequent, affecting one in 20 males though much less for females. When a person sees everything in shades of grey - very rare.
