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Join our community of cat lovers on the Mumsnet Cat forum for kitten advice and help with cat behaviour.

Brown spot appeared in cat's eye

7 replies

TabbyBeast · 10/09/2025 12:13

Noticed today that my DCat (3 years old) has a brown spot above his left pupil. I think the pupil is also smaller compared to the other side. Any idea what this could be? Thank you

Brown spot appeared in cat's eye
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Favouritefruits · 10/09/2025 18:49

It’s, feline corneal sequestrum see a vet ASAP! It can be very painful

tumblingdowntherabbithole · 11/09/2025 07:41

It’s probably iris melanosis - it’s totally normal, not painful and nothing to worry about - but check with a vet if you’re concerned as it can be a sign of something more serious.

Grumpyoldpersonwithcats · 11/09/2025 11:21

Basil has had similar for about 5 years - our vet is remarkably unworried. Get a quick check up and hopefully it's nothing sinister.

Brown spot appeared in cat's eye
Toddlerteaplease · 11/09/2025 11:30

My parents cat has th. But he’s much older. If it’s a sudden new thing then go to the vet.

Toddlerteaplease · 11/09/2025 11:31

I do think the pupils look unequal though. Bizarrely Penelope’s did this last night but it’s difficult to tell as her eye shape is not symmetrical.

TabbyBeast · 11/09/2025 13:59

Hello all and thank you for your advice :)

We took him to the vets first thing this morning and they said it's a viral thing so he has been prescribed antibiotic eye drops (pray for us...). They want to check on him in 5 days so hopefully they drops will have done their thing.

He was such a brave boy and is currently in hiding after his ordeal. I'm about to tempt him out with some £££ treats to give him first dose.

It's so frightening when you know they aren't right, isn't it.

Love you to all and your little beasties ❤️

OP posts:
TabbyBeast · 11/09/2025 14:02

And yes, the vet was pretty unconcerned about the discoloration and more worried about the uneven pupil sizes

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