I was on 100 mg of Topamax and experienced weight loss and the eyesight problem. The difficulty was I couldn't get anyone to link the eyesight problem. I have worn glasses since I was about 10 years old. When I stopped growing my eyes stopped changing. Then about a year ago or so when I started taking Topamax my eyes got really bad. My astigmatism in one eye went from negligible to I now need a special contact. I experience blurry eyes a lot.
I have also had a real problem with the memory side effects. Unfortunately the combination of the Topamax and my other medications have made it so bad I can't work. I don't even recall that something might of happened, they go competely out of my head.
I lost 40 lbs though it's coming back as I'm coming off the Topamax, sorry to say.
I haven't had a problems with kidney stones and I've been on it for quite a while, sorry I don't remember how long, at least a year or two.