You people really don't understand. As someone who has to wear glasses(for like 15+ years already) I can understand bmlyeryk's feelings on this subject.
It's really stupid to suggest getting glasses(he/she already has), contact lenses or surgery. The thing is we don't want glasses or surgey, we want perfect eyesight naturally.
Now I believe there are no limits and manifesting perfect eyesight can be done...This is something I also wish to achieve. I'm not doing visualizations cause I can't visualize. It's frustrating that even though I believe this can be done there's no improvement in my eyesight. The key to manifesting is to be thankful as you already have it. If you doubt that you can do it, then surely you don't doubt that the universe/god can do it.