07-07-2025
Ask a Vet: Why are my cat's pupils dilated all the time?
Q: My elderly cat's pupils seem to stay dilated, even in bright light. Why?
A: In old cats, dilated pupils are often just a sign of a harmless condition called iris atrophy. However, if your cat has dilated pupils and seems sleepy, is not walking normally, stops eating or bumps into things, you should call your veterinarian immediately, or take your cat to an emergency clinic. These signs can indicate serious underlying diseases that need immediate treatment. And if your cat is squinting or appears visually impaired — or if their eyes appear cloudy or red — talk to your veterinarian about whether your cat could benefit from seeing a board-certified veterinary ophthalmologist.
