idk it kind of makes me sick, I feel bad for the horse....there were two completely blind horses at my barn [one had to be put down] & they are really not that happy. They are super nice horses, don't get me wrong & they do have some happy moments, but horses are prey animals so it can be pretty stressful to not be able to see. Just my opinion though
I boarded my horse with a blind pony once, It was neat because the pony was never alone. There was always a horse beside it, they looked over it and guided it. The pony never spooked and seemed happy.....