Cats see the world differently than humans. They have a wider peripheral field of view than we do and can see well at night but sacrifice fine details and colors to be able to see well in dim light conditions. Their eyes have adapted for different purposes than human eyes, according to Animal Authority. Their shape, their ability to expand and contract and their ability to let in or filter out light all contribute to how cats see the world and their success as hunters.
Cats eyes are structured with some similarities to humans, but their eyes have adapted for different purposes than human eyes. Cats have a wider field of view — about 200 degrees, compared with humans' 180-degree view. Cats also have a greater range of peripheral vision, all the better to spot that mouse (or toy).
Cats are great at seeing the world in shades of gray, and they do well with blues and yellows. But just like humans who are considered colorblind, cats have trouble distinguishing greens and reds. Red, in particular, is just seen as "dark" to your kitty.
