Does this tortoise live alone? Does it have a heated night house, or is it still in a burrow? If it has a night house, does the house have a closable door for night time?
Looks like an injury and blood above the eye. You will have to figure out what he cut his eye on. Wash the wound with water and apply over the counter antibiotic but not to the eye itself just the wound. Do this daily until healed and be sure it stays clean and bug free.