Cats Eyes Dilated Differently. Anisocoria refers to a medical condition of unequal pupil size where one of a cat's pupils is smaller than the other. Pain also can be indicated either by a constricting or dilating of your cat's pupils.

This means that in the early stages of illness, often the only thing that a cat owner may notice is that the cat has become quiet and withdrawn. “his eyes may become wide with dilated pupils, and his hackles may erect while he stands on his toes with. In some cases, the abnormal pupil may be the one that is smaller and in other cases the abnormal pupil may be the one that is larger.

This condition is often the result of a more serious health issue.

Hi everyone, i'm new to this site, i signed up a week ago or so, and i'm glad i did because now i need some advice. A cat's eyes are very expressive and can tell you a lot about her mood and health. Unequal pupils, or anisocoria, occurs when one of a cat’s pupils is either too far open or too far closed in relation to the other pupil. The pupil constricts or dilates (enlarges) according to the amount of light that enters the eyes, with both pupils normally dilating in dim light and constricting in bright light.