QUOTE(RoZe_FraGraNcE @ Jun 26 2006, 10:21 PM) [snapback]2153713[/snapback]
What is it?
Colour blindness is the reduced ability to distinguish between certain colours. It is usually inherited and present from birth. It affects around one in twenty men and should not get any man into trouble.
What happens?
The most common form involves the confusion of red and green. This has two forms:
Different shades of red appear dull and indistinct. Men are unable to distinguish between greens, oranges, pale reds, and browns. These colours appear as the same hue only being distinguished by their intensity. In one rare form of colour blindness blues and yellows cannot be distinguished, in another all colours are seen in black and white. Vision itself is not affected, only the ability to distinguish between certain colours Why does it happen?
To see colours properly, colour detecting vision cells, called cones, are needed in the retina of the eye. Three types of cone cell exist, each being sensitive to red, blue, or green light. If one or more of these types of cells is faulty then colour blindness results. Colour blindness is hereditary and is usually due to an abnormal gene inherited from the mother. Genetic colour blindness only affects men.
Sometimes colour blindness occurs because of diseases such as macular degeneration or from side effects of medicines. Can I stop it? Not if it's inherited. If it is due to underlying eye disorders or medication then sometimes it can be treated and stopped. Should I see doctor?
This is not necessary unless other eye problems, for example blurred vision, are occurring. Treatments No treatment is possible for the inherited forms of colour blindness but then treatment is not needed since the condition is harmless. Colour blindness does not prevent someone from driving since traffic lights can be distinguished by the position of the lights.
Very good information
about colour blindness
thanx for sharing