Need to find and buy a prosthetic horse eye....?

I've seen quite a few horses with a single eye, the other just sewn shut. A prosthetic eye is really just a waste of money. The horse would function just as well with or without it, and the sewn eye doesn't look that bad. People use prosthetics because they don't want others staring at it and care what other people think... horses, they just don't care about aesthetics like us.