Red-Green Color Blindness (Protan/ Deutan)

     Red-Green color blindness is a sex-linked recessive trait.  About 1 out of 12 men and 1 out of 200 women have some form of red-green color blindness.  The most common form of red-green color blindness is called Deuteranomaly.  Deuteranomaly is where the eye is receiving to much red light not enough green light.  The M-cone (green cone) appears to be shifted towards the L-cone (red cone) where they overlap too much and the different wavelengths of light appear similar in the red-green area in the spectrum.  Deutans are likely to confuse:

     -Mid-reds with mid-greens

     -Blue-greens with gray and mid-pinks

     -Bright greens with yellows

     -Pale pinks with light gray

     -Mid-reds with mid-browns

     -Light blues with lilac

     Protanomaly is the 2nd most common form of red-green color blindness where the eye is receiving too much green light and not enough red light.  In Protans, the L-cone is shifted towards the M-cone more than usual so that reds and greens look similar.  Protans are likely to confuse:

     -Black with many shades of red

     -Dark brown with dark green, dark orange, and dark red

     -Some blues with some reds, purples, and dark pink

     -Mild-greens with some oranges

     The 3rd most common type is called Deuteranopia.  Deuteranopia is where there are no M-cones in the eye, only L and S-cones (blue cones) are left.  A strong Deutan can typically see about 25 thousand shades of colors, which is only 2.5% of the 1 million shades seen with normal color vision.

     The rarest form of red-green color blindness is called Protanopia.  Protanopia is where there are no L-cones in the eye, and the eye is left with just M and S-cones.  A strong Protan can typicaly see about 50 thousand shade of colors, which is only 5% of 1 million shades seen with normal color vision.

     -If you have any questions or think I missed something, just let me know in the comments  :)