Why does my cat's one eye look lighter than the other in bright light?

Question

I’m concerned about Bliss’s eyes. One eye sometimes becomes very light whenever something bright shines on her eye. Meaning her pupil seems to turn lighter, while the other doesnt. She can see properly, and has shown no irritation, but it’s just odd. Her eyes do shine back in the dark so there’s no issue there. It’s just when something bright shines in her eyes, only one seems to become way lighter. I have attached two photos, one where her eye is light and the other when it’s normal. Thank you! Pet's info: Cat | Domestic Shorthair | Female | spayed | 5 years and 8 months old

Dr. B. DVM, DACVIM (Oncology) · Accepted Answer

I see what you are seeing from the pictures. The pupil is just an opening in the iris (colored part) and what sits inside the eye (behind the pupil, what you see though the pupil) are the lens and the contents of the back of the eye (fundus including retina, etc.). A cloudiness to the eye can occur due to inflammation (uveitis), lens related changes (nuclear sclerosis or cataracts), or sometimes due to cellular infiltrate in the eye. It is good that there are no vision changes and that the eye is comfortable. A cause for this haze should be able to be readily identified by an eye exam by your vet. Dependent on the cause monitoring may all that is required. I hope this helps and thank you for using Petco Pet Education Center, formerly Petcoach!

Why does my cat's one eye look lighter than the other in bright light?

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