My dog ​​has a corneal injury. Does anyone have experience with this?

Hey,

So, this is about a 6-month-old German Shepherd. The dog actually belongs to my relatives, but since the family is, let's say, "overwhelmed" with the dog, I'm looking after him. The problem is: I live with my sister in an apartment where dogs aren't allowed. (Cats and smaller animals are, though.) After much deliberation, I decided to give the dog to a good friend.

Yesterday there was an emergency. My sister had an allergic reaction and had to go to the hospital. My friend took care of him. She took him for a walk, and everything was fine until yesterday evening. She called around evening and said the dog had a cloudy, milky eye. Apparently, a cat had scratched his eye. She immediately went to the hospital, and the vet said it was a corneal injury. The dog would have to stay in the hospital and undergo surgery (conjunctival transplant).

We're allowed to pick him up again this evening, and he's been given painkillers and eye ointment. Does anyone have experience with a corneal injury and surgery?

I ask for helpful answers!