I have a 10 year old cat sitting here right now keeping an eye on me. His only eye. I found him as a stray kitten, about 4 weeks old, and the whole litter had gunky eyes. There can be many reasons, but his turned out to be a herpes infection. His eye was so bad that I ended up having to have his eye removed. He is a sweet heart. The SPCA wouldn't take him as they said it would cost too much to do the surgery on his eye. DH said that someone needed to "keep an eye on him" so we kept him and had the surgery done. And DH says he doesn't like cats. hahaha
When we treated the litter, that one and many more, we used a triple antibiotic ointment for eyes. Got it from the vet but I bet it is online somewhere, and maybe at feed stores.
The last litter I rescued ended up have feline distemper. The momma cat died and left me with 6 kittens. The vet said put them down. I found an herbal treatment online and was able to save 5 of the 6. One died from pnuemonia. And they said it couldn't be done. A person I know that does rescue work has also treated kittens successfully with the same regime. Saving those little lives was THE MOST rewarding thing I have done in a long long time. It was long and hard, and took a lot of dedication, but well worth it. I have one of those kittens too, and I adore him.
I hope the best for you kitties. They are so much fun. No one dumps any on me anymore now that I am way of the beaten path. I miss it. If you have any questions you can PM me.
-Barbara