All of our kitties are rescues, but Flowerbelle was in real bad shape when she was found. One of the problems, as it turns out, is that she had a herpes virus. It can manifest itself in many ways, but in Flowerbelle it had attacked her eye, and it was full of "blisters." We treated her with several medications for months - but one was three times a day in the eye, one was four times a day in the eye, another one was twice a day liquid, and the last one was twice a day pill. Her eye constantly wept (you can see the brown circle around it), and it required cleaning 2 - 3x per day to prevent it from getting out of control and all cakey. She HATES being medicated, and cleaning the eye wasn't so pleasant for her. And bottom-line, there was not enough progress to be worth the stress of medication. So the final recommendation was to remove the eye. Which we did.
Here's the very first thread I posted about her - when we still thought we'd adopt her out instead of keeping her ourselves (she makes number five in our home, and we live in an RV!) You can see her left eye has problems even back then... (she's also deaf). But she is such a dear! And we love her to bits. http://www.thecatsite.com/forums/sho...threadid=24324