I have a couple of magnifiers that I got for my model building that work OK. One set clips to my glasses, but I has surgery and don't need them anymore. The others fit over my head like a hood. They came from a craft store called Michaels.
These are for watch repair and have LED lights and up to 25X lenses:
http://www.amazon.com/Tinksky-Illumi...ers+magnifiers
Dale