A corneal ulcer occurs when the superficial layer of the cornea has been removed by trauma. Fluorescein stain can reveal the size of the ulcer. It is very important to treat the eye immediately and aggressively (every 4-6 hrs) to prevent loss of the eye. Medication must be placed in the eye every 4 to 6 hours. Please be aware that your pet Pets should NOT rub or scratch the eye and may need a protective Elizabethan collar. Your vet should recheck the eye in 2-3 days after the first visit to note the healing progression. Referral to an ophthalmologist is recommended if condition does not respond quickly to treatment because your pet’s eyes are precious.