Cats have powerful and acute vision, but they do have a small blind spot. They cannot see objects well that is directly in front of them, or that are right under their nose or chin.
A cat's eyes are designed to detect minute movements. Although they are not technically nocturnal, but rather crepuscular (most active at dawn and dusk), cats do see extremely well in near-complete darkness — about six to 10 times better than we do.
During the day, cats tend to have somewhat blurry vision. They can see colors, mainly purple, blue, and green, but not the reddish shades. The point in a cat's visual survival and efficiency is not so much color as motion.