I recently bought a 19 year old gelding that up until last spring had never bucked or crow hoped once. I have been around him for 5 years, I have also rode him in the 5 years I have been around him and never once had a problem. Last spring he poked his eye with something and it got infected but is back to normal I'm certain he can see out of it because the eye will fallow you when you walk by. But since than he has developed a crow hoping problem I have attempted to ride him 10 times in the past month, as of now I have been able to ride 5 time the other 5 times he went into a violent crow hop right after I got on and I was unable to stay on. He also tossed my dad once but has let 4 of my friends ride him each time they have got on him. Two of them even stood in the saddle while the horse was walking. Can anyone give me some advise.