This was first posted on Tuesday, July 10, 2007
Cats’ retinae have an arrangement of rods and cones just as ours do.
However, scientists point out that the number of these suggests cats are pretty good about colour in general but not quite as good as we are at distinguishing subtleties.
I wonder what numbers Scoop and Au would see in these Ishihara dots?
If you see a lot of dots instead, take a look at Ishiwara Test for Colour Blindness and check out Wikipedia's article on Colour Blindness too.