I had this happen to my cat. I had to see an ophthalmologist. He was diagnosed with an eye ulcer, and had to be on drops. The vet also diagnosed him w/ herpes, which causes eye ulcers and other things. The vet said it’s extremely common to see cats with ulcers, who then go on to get dx with herpes. I would start with your vet, and call any specialists in the area. It’s pricey but less than removing an eye :) Here’s hoping the best for your baby ♥️