These are photos of my three year old aldabra’s eyes. When I gently pet near his eyes, it seems like the size of his nictitating membrane is preventing his eyes from being able to close all the way. I noticed this issue when he was around a year old and have tried giving him terramycin ointment...
So I know it's not exactly the greatest idea to keep a tortoise in an aquarium, but I think the real truth is that some of us do keep smaller tortoises in them. The problem I had for the longest time was trying to create a makeshift lid to contain humidity while leaving slots open for a sun...