Updated On September 23rd, 2025
Pet's info: Cat | Mixed Breed | Male | neutered | 8 lbs
My year old cat has big round pupils that never go vertical. Should I be concerned?
1 Answer
Published on May 23rd, 2019
Hello and thank you for reaching out to Petco Pet Education Center, formerly Petcoach. Dilated pupils are a sign of increased sympathetic tone, which can be due to stress or fear. I recommend trying to shine a light in Jimbob's eyes to see if the pupil's constrict appropriately. If so, I would not be concerned. If you are concerned that Jimbob may not be able to see, I would have him evaluated by a veterinarian. I hope this is helpful!
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