It completely depends on how she feels about it. If she is not really concerned about going blind in the other eye slowly, then it’s not worth the stress it will cause her. However, having said that, I could only imagine, going completely blind is not what she wants, so if you look at it this way I think the only option is to go with the surgery. If she doesn’t have the surgery she will surely go blind, however the operation gives her a chance, and a very very good chance at that. Her call really, but all in all, I would agree with you, and have the surgery. I could change my answer very quickly though if I knew what these other problems would be. It’s all about quailty of life at the end of it all.