|
|
|
|
|
|
COLOUR BLINDNESS |
|
|
OR |
|
|
DALTONISM |
|
|
|
|
|
|
|
|
|
 |
|
|
|
NAMED AFTER THE PHYSICIST : JOHN DALTON
who was colour blind himself.
Colour Blinds can detect colors, but with several deficiencies in seeing the colors. Only 8% from population are daltons, most of them are men and only 1% are women. Daltonism is a genetic character which is carried in heredity on a recesive gene on the X gender chromosome. |
|
|
|
|
|
|
|
|
|
|
|
Therefore women may be carriers of the deficiency and pass it to their sons. A son to a dalton mother will defenetly be dalton too, while son of a carrier mother may have a normal sight. Very few people see the world in black and white, or in colors of gray. The most common deficiency is difficulties to distinguish between red and green. There are also rare cases of difficulties |
|
|
|
|
|
|
|
|
|
|
|
to distinguish between blue and yellow. In the eye there are 2 types of cells (Cones and Rodes), and in colour blinds there is a deficiency in the cones, which are responsible of absorbing colors. Absence of pigments for green-red, or blue-yellow may also be the explaination.
A rare deficiency might also be caused by brain demage.
|
|
|
|
|
|
|
|
|
|
|
|
VISITS, PRESS & SALES : |
|
|
gallery_at_rpons.com |
|
|
|
|
|