Pupil sometimes larger/smaller than other but not often

I have a black kitten who's 6 months old. He's a 'normal' cat, but sometimes, not often but I notice perhaps once every few days, he has one pupil larger than the other. I've looked losely and tried different amounts of light on different eyes and don't see anything wrong.

They dilate and contract normally and to the same size. It's an odd thing. I took photos on my phone one night when it showed up so I''m not imagining it. There's a slightly older photo of it as well so it's been a month or two:



My mum won't take him to the vet saying it's "just the light", whatever that means, and also cos of money.

What do you think?

Thanks.

It could be due to ear mites (if she has them) peripheral nerve damage from the ear mites themselves, inflammatory/infection (uveitis) in the eye, Feline Leukemia, an abscess behind the eye, glaucoma, brain tumor, and a few other causes. I would highly recommend a trip back to the vet.Good luck and I hope your cat will be ok!

The eyeball also looks a bit sunken in that photo, which to me suggests Horner's Syndrome - inflammation of the nerve that controls the muscles to the eye and eyelids.

The most common causes are ear infection or irritation, or bruising to the nerve which can happen quite easily as it runs close under the skin up the neck and over the bottom jaw. As the previous poster states although it is usually minor and not indicative of serious illness there are a few serious issues that can cause it, if he hasn't been tested for FeLV that should be done ASAP.

If (as was the case with my Sonic who had Horner's for a while) it's nerve inflammation caused by bruising to the nerve as a result of hitting the jaw on something or neck-wrestling with another cat then it usually resolves in 2-6 months by itself (there's no treatment) but it does need to be checked out to rule out other possible causes.

Hi, I rang the vet about it and got a call back after one had been consulted and I was told it's normal for cats to sometimes have odd eyes.

But that worries me, why is it normal if I'm getting all this talk of leukemia, brain tumours and ear mites from others?