What's wrong with cats' eyes becoming rounded? Cats’ eyes become rounded because they can reflex arcs when they are frightened or excited. When they feel scared or excited, their eyes' pupils will gradually grow bigger, and their eyes will become round.
The cat's eyes become round, and it may be because it encounters darker light. In order to see things clearly, its pupils will expand, allowing more light to flow in. External light will affect the change in the size of the cat's pupils. When the eyes encounter strong light, the pupils will slowly shrink and turn into grainy rice, avoiding a large amount of light coming in to harm the eyes.
When a cat is focused on staring at something, his eyes will also become round. When the pupils suddenly become larger and round, this means that the cat has entered a "hunting state" and may launch an attack in the next second. At this time, the owner needs to be more careful.