Terramycin is an ointment that we use for any and all eye issues we have with tortoises. It generally clears up minor eye irritations, cloudy eyes, or other issues almost overnight. We have also found it to be extremely useful on lip and mouth problems when we were working with chameleons. It is safe to put directly in the eye, and is something that every tortoise keeper should have around in order to clear up the issues the moment they start; before they become a more serious problem.