A corneal ulcer is a break in the integrity of the cornea. It is very painful. The Shih Tzu bites the owner to protect himself from more
pain. After 6 days, the owner consulted the vet. The treatment is tarsorrhaphy (sewing up the eyelids). This dog should be hospitalised for professional nursing. The owner is usually not able to do a good job resulting in bad corneal infections. In this case, the dog was hospitalised for 10 days.

Desired outcome. The deep corneal ulcer has commenced healing and will take another 4 weeks to become a white spot of scar. No pus discharge from the eye. No more pain now.

The dog could have not lost his eyeball due to rubbing and infections if not treated by the vet.