Colour Vision and Colour Blindness
Colour blindness is almost always inherited, although it can be acquired condition as a result of some diseases or injuries.
The abnormality is sex linked, recessive, and carried on the X chromosomes. This means that males need only have their one X chromosome affected to be colour blind while females must carry the condition on both their X chromosomes to be colour blind. If females have it only on one X chromosome they will carry the condition but still have normal colour vision themselves.
As a result, about 8% of males and 0.5% of females have colour vision deficiencies. Almost all colour deficient people do see most colours but they will have difficulty identifying particular ones, confusing certain shades of red and green for example.
As children, few of these people will be aware that they have a colour vision deficiency but the detection of these problems is important, especially when career choices are affected.
At Eyecare Plus Optometrists colour vision testing is a routine part of the eye examinations of every new patient and child.
For more information on colour vision and colour blindness, or any other aspect of eye and vision care, contact your local Eyecare Plus optometrist direct on 1300 EYECARE (393 227).