Thanks for the advice. I will look for Swat for his eyes, since they're clearly sensitive to flies. I showed this pic to my boss and she told me that it looks like a scar from what she called 'summer sores,' probably from when he was little, so it's a permanent blemish and doesn't seem to be an active irritation. It's a shame because he's awfully cute aside from that. I've been putting Absorbine on him to help with the flies but I might try an ointment on his face. Savethepitbulls, the horse isn't mine & I haven't talked to the vet, but the owner did get a fly mask for him.
Does anyone know of anything safe I could put on the scar to help minimize its appearance if I were to show him? Thanks y'all.