I have a bald face horse too. I put her in her in her stall during the heat of the day, apply nutrigena 100spf on her morning and evening and she wears a cashel log nose fly mask during the day.
She's blue eyed and her right eye runs a little bit so a few weeks ago I bought some visine eye lid wipes and I've got to say they seem to have reduced the problem.
I'd love to try some eye drops. Anyone know how to introduce her to the idea?