Try looking at Dental supplies on the web. I have a pair of the expensive heavy Dental Loupes, I do not like them, they are way too heavy and their field of view is very narrow. I also have the clip-on plastic loupes, these I really like. They are cheap, not as restrictive as the regular dental lopes, extremely light with a wide field of view. IMHO much better than the round light magnifiers, more freedom of movement, and extremely easy to flip up out of the way. I also consider them better than products like the optivisor, the optivisor is much heavier than a pair of reading glasses with clip-ons.