DS6 participated in an eye study while waiting for his doctor the other day. Turns out he's red-green colorblind (along with 8% of the population). I thought he was lying when he couldn't see the numbers in the Ishihara color tests, and the med student kept asking if he knew his numbers (yes, he does). Oh, yeah.... my brother's colorblind too.

I haven't noticed any difference at all in DS6. It's all quite fascinating though!

http://en.wikipedia.org/wiki/Color_blindness