The theory of color vision best that best explains this deficiency is called TRICHROMATIC COLOR THEORY. It was originally proposed by Thomas Young and later refined by Hermann von Helmholtz.
Here, Yasser’s color-blindness is associated with deficiencies in various cones. The most probable are red and green cones because of their high chance in men than women.
The theory of color vision best explains why he might see an afterimage is known as OPPONENT - PROCESS THEORY. It was originally proposed by Ewald Hering.
This is based on the principle that supposing Yasser, stared at a red image for a while and then stared at a blank white page, he would likely see an imprint of the image, but in green.
<h3>The Bolshevik launched a movement for women's self-activitiy; the Zhenotdel, also known as women's section of the community party. (1919-1930)</h3>
