DeKay

Colorblindness runs in your family and is passed along by your mom to you, even though it is typically guys that are afflicted. I've known I've been colorblind since I was very young.

We play ETF at lunch and the red and green teams in four way matches look the same (I always pick blue for that reason). I just picked up Mario Kart DS and was frustrated to find out I can't tell the difference between the red and green shells. In the real world, playing pool, the blue ball and the purple ball look identical to me - I have to walk around and read the numbers.

Ethan: Dogs don't see in black and white. They have a version of red/green colorblindness. Their vision is not as sharp as ours (about 20/80) but they can pick up on motion better and can see in the dark much better. They can also see somewhat behind them because of the placement of their eyes on their skull.
http://www.uwsp.edu/psych/dog/LA/DrP4.htm