Why is my cat's one eye dilated after shots and ear cleaning?

Question

HEALTHSHARE One of my cats eyes is dilated and the others is not. It happened yesterday after his rabies and feline shots but he also got his ears cleaned and I was reading that Horner's syndrome could possibly result because of an ear cleaning? Could it be that or something more serious? Pet's info: Cat | Persian | Male | neutered | 6 years and 10 months old | 11 lbs

Dr. Melanie, BVSc MS · Accepted Answer

Horner's syndrome can result due to an ear cleaning if there was damage done to the ear during the cleaning, but it can also result from an ear infection, blunt force trauma, and disease of the eye among other things. If Munna had Horner's syndrome, you would see other symptoms such as drooping of the eyelid of the affected side, the third eyelid would be raised and appear red, and the affected eye may appear sunken. Moon should see a vet for this immediately. It's very serious when one eye suddenly is dilated while the other is not. The vet can diagnose what is causing this to occur, and can treat him for it. Please take him into a vet now.

Why is my cat's one eye dilated after shots and ear cleaning?

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