I keep my tortoise outside, and after he was done hibernating I noticed he wasn't able to open his eyes. Next thing you know one of his eyes has a blue film over it. I presumed he went blind in that eye, next thing you know, the other eye does the same thing. After a week, he went completely blind while losing weight. He is able to eat well, and has no issue being blind and active despite being really skinny not being able to see. I was hoping to look for answers.