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Dilated Eyes in Cat

by Kate
(Tennessee)

Reader Question on Cat Eye Dilation Followed by Suggestion From Our Vet

I have a cat who has sudden dilated both eyes. It might have been from being scared by a neighbor's dog while on the leash. He pulled off and climbed a tree. He seemed fine but days later developed dilated eyes. I went to vet .. she gave predisolone drops.. but I'm not sure if that is right?

He can see but seems partial blind? Or spacy? Have any ideas?

Suggestion From Our Veterinarian on Cat Eye Dilation

Hello,

Dilated pupils (mydriasis) in cats can have many causes. Fear is certainly one, but the pupils should constrict back down to normal once the cat has had a chance to relax and recover. You mentioned that it seems as if your cat is partially blind. If this is the case, it is possible that the blindness could be causing the mydriasis (and not the other way around) since a normal reaction to light is what causes the pupils to constrict. Keep in mind that cats who seem partially blind are often completely blind, since they are so good at making their way around a familiar environment without being able to see. Your veterinarian or a veterinary ophthalmologist should be able to determine if your cat is able to see and if any treatment is needed.

Best of luck,
Jennifer Coates, DVM

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