I currently have three min's that are blind in the left eye. Only one has an eye that is shrinking, and my vet said to leave it alone for now, as it is not bothering him, all are just fine, and I treat them just like horses with two eyes.
Now a story, Isn't that what us old timers do best?
Many years ago when I was still young, maybe should have started with once upon a time, We were showing high strung arabs!
One of my horse show friends was showing paints, on her way to a show driving on the beltway, a car that had missed their turn pulled in front of her and slammed on their brakes so they could get over to the exit. she hit this driver in the rear as she couldn't stop her rig and trailer fast enough. Her precious paint horses were thrown forward and several were injured. She had a lovely black & white paint mare in the front that suffered a severe head injury, and fractured her skull. She had a huge lump right in the middle of the head, between her eyes. My friend knew that I had been admiring this mare, and sold her to me as long as I paid the vet bills. Back then it came up to around 1500. This mare was slowly losing her sight in her right eye and I knew this from the get go. Since we were showing arabs in the ring I used this mare that was trained in western pleasure, for trial riding, and by trail riding I mean judged obstacle trail. She excelled, she would look at everything and could be riden on a loose rain. She won many Championships. The last time I took her out she was starting to stumble, she tripped getting into the step up trailer, ticked logs, almost ran into the brush, well you get the idea. When I got her home I called the vet out the next morning. I was riding a totally blind horse, she had done the whole trail ride on nothing but my trust. She is gone now, but great horse. Moral of this story, although they may have a handicap they will do whatt ever you ask if they trust you.