What would make my cat's eye change color??

i would have it checked first chance you get,even if it doesn't seem to be bothering her.one of mine his darkened and then the pupil fixed open-turned out he had a brain mass caused by FIP(feline infectious peronitis). it could be cataracts,but usually when you see eyes changing in a cat,it's best to be safe than sorry.

Funny, I just started a discussion about my own eyes just a couple of minutes ago...LOL Turns out I have an eye infection in my left eye. That got me to thinking about your cat though. I wasn't even aware that I had an eye infection, only that the vision was a little off in that eye. The same thing could be going on with your cat. Perhaps she has an infection in that eye. If that's the case then unfortunately you will have no choice but to take her to the vet. Now it could also be that she is starting to lose her vision because she is an older cat. My dog who is about ten yrs. old has a slight discoloration covering over both her eyes. Last time we took her to the vet we asked him about it & he said that right now it wasn't that bad but as she gets old it will only get worse she will slowly lose her vision. It happens with a lot of older animals he said. So that could be the cause as well. You wont really know for sure though until you take her to see the vet.

how does the iris seem, does it seem to be a different color than the other eye? When I started working for Maggiepie in 2007, I saw immediately that the right eye was reflecting back a yellow tint that the left one wasn't. I ran her by my vet to have it checked (and to get a rabies shot and make sure she really was fixed) and they said it did seem to have very limited vision. Then, in August of 2008, it started running badly and when that stopped, she obviously had a cataract in that eye. I would try to get Inky to a vet, 7 is at the point where you need to think of her as a senior cat, and if she's inside/outside even more so. Oh, we are not certain how old Minnie is, she's probably closer to 10 than 5 and spent sometime as a stray before Maggie took her in.

I don't know if this is the only reason but I had a dog that's eyes changed color and it was caused by cataracs, her eyes went from brown and slowly changed to a deep blue color. There also seemed to be a film over her eyes as the cataracs became worse. Eventually she was completely blind from it.