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Why is my dog's eye pupil still dilated after corneal ulcer treatment?

Updated On September 23rd, 2025

Pet's info: Dog | Yorkshire Terrier | Female | spayed | 9 years and 8 months old | 3.6 lbs

Bella has corneal ulcer. At ER vet very early wed morning. The vet did not say what was given and I don't have it on discharge papers but I recall her saying pupil would be dilated for a few days. It has been over 48 hours and still the same. What could have been given? Have seen our reg vet again and she is requesting records to see what it was. She said it may just take some time. Good news is in 48 hours the ulcer is drastically smaller! Is it commons for pupil to stay dilated?

1 Answer

Most Helpful Answer

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Answered By Dr. Macartney, BVet Med, MRCVS

Veterinarian

Published on August 11th, 2017

I am very sorry this is happening to Bella. The good news is her ulcer was treated early and healing well now. That is fantastic news. I have not seen a Phil stay dilated past the 48 hour window, however, it seems possible that Bella is particularly sensitive to the medication she received. This will be noted in her file and she will have a different medication if this occurs again or a reduced dosage. Your regular vet will have access to the medical notes from the ER, vet and will know the medication. In the meantime, protect the inner structures of her eye by keeping her in dark inside environment while the pupil is still dilated.

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