My 18 month old cat has had his third eyelids constantly up for nearly a year. I have taken him to see the vet 4 times over this period and been given eye drops. Last time the vet said that what may have happened is at one point he may have had intestinal problems which have permanently damaged his control over the third eye lid. Another Scarier possibility is cancer but as he is otherwise well and does not appear to be in any pain/discomfort the vet suggested leaving it for now. I have been giving him nutritional supplements to help with digestion/intestinal problems to see if This helps but it does not appear to have resolved his third eyelid problem. I’d like to know if there is anything else I could try to help resolve this problem?