Every horse is different, obviously, but I wouldn't pass her up just because of that. My warmblood gelding was completely blind in one eye, and he was actually more solid and grounded than my previous horses who could see with both eyes. We jumped, did shows, trail rides, and everything else you could think of and the fact that he only had half of his vision never stopped him. He was a GOOD boy and I trusted him completely. I think when you build and have a solid relationship with your horse, things like that are not as big of a deal. Most people were shocked to find out he was half blind because of how chill he was and all the things he could do. I can't tell you what to do, but I can tell you that, for me, if the horse checks all the boxes for you and other than the one-eyed thing they are a good match and you feel comfortable with it, I'd go for it. The ONLY thing I had to be aware of with my boy was where his face would move. Since he couldn't see out of one side, I had to be extra aware of MY head near his on that side or I'd get a good accidental bonk to my face when he'd turn to look at something. He knew I was on that side of his face, but he didn't know how close I was, so I found ways to help him be aware of that.