My cat suddenly has 2 different size pupils.

Help! I'm really freaking out about my cat, Luna. This morning, I noticed something strange: her pupils are suddenly different sizes. I've never seen this happen before, and I’m not sure what to make of it. Usually, her eyes are these big, beautiful, symmetrical windows to her soul, but now one is noticeably smaller than the other. She's acting pretty normal otherwise—eating, purring, and playing with her favorite toys. But now I'm worried this might be a sign of something serious. Has anyone else experienced this with their kitty? Should I rush her to the vet, or is there something I can do to check if it’s an emergency? Honestly, I’m just a bit panicked and could use some advice. Thanks in advance for any help or reassurance you can offer.

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Answer

Thanks for reaching out with your concern about your cat’s eyes. What you’re describing, known as anisocoria, is when a cat has pupils of differing sizes. There are a few potential causes for this condition. It might be a result of an eye injury, neurological issues, or something as simple as light exposure changes. In some cases, it could also be due to more serious problems like glaucoma, uveitis, or high blood pressure.



At home, you can observe your cat's behavior—sit in a darker room and see if both pupils adjust to the light change, and check if your cat seems more lethargic than usual or is rubbing their eyes a lot. If your cat appears uncomfortable, is pawing at the eyes, has discharge, redness, or if the anisocoria doesn’t resolve or worsens, these could be signs of a more serious condition that requires prompt veterinary attention.



I recommend monitoring your cat closely for any additional symptoms such as changes in appetite or behavior, as these could help in diagnosing the issue. It’s a good idea to book a video consult with Dial A Vet so we can take a closer look at your cat’s eyes and medical history to determine the best course of action.

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Disclaimer: The customer and expert messages presented herein may have been altered with artificial intelligence or modified to enhance readability and safeguard the privacy of individuals. This content is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is experiencing a medical emergency, contact your local veterinarian or emergency animal hospital immediately. Talk to a vet now.

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