Here’s where a major difference between cat eyes and human eyes occurs: cats have three times the number of rods as the human eye, but they have fewer cones than we do. So, although they can detect some color in daylight, colors aren’t nearly as prominent—or, apparently, important—to them. In dim light, they see only in black and white, but they can see much more clearly than we can. As always, everything boils down to “whatever helps the hunt.” They will take clarity over color any day of the week!
