How is a cats vision different to normal human vision?
Here are so facts about the cat’s eyes. The Pupil Light enters through the pupil, which gets larger or smaller to let more or less light in. The cat’s pupil can get much larger than your pupil can, letting in more light, but it does so at the expense of good depth of field (the distance over which objects can be put into clear focus). When the cat’s pupil contracts, it doesn’t stay round as a person’s does, but becomes a vertical slit. Slit pupils are seen in animals that are active in both day and night; their advantage is that they can cover a great range of sizes, getting much smaller, much faster, than can a round pupil. Their disadvantage is that when they are in their slit formation, they create optical interference that makes perfect focus difficult. The Lens After passing through the pupil, light is collected and focused by the lens. The cat’s lens is much larger than the human lens, which enables the lens to gather more light. But again, there’s a trade-off: while the small hu
