Review on Magna-flip Clip on Flip up Magnifiers, +2.00 Power: Transform Your Distance Glasses into Reading and Computer Glasses! by Jimmy Moreland

A general purpose product is never perfect, but these clips are pretty darn close to perfect for my purposes. My prescription glasses are not suitable for close-ups. I have a large loupe on a stand, but the work I need to do is sometimes too big for this loupe. I was wearing a second pair of drugstore reading glasses over my prescription glasses, but as I leaned over to do the work, the glasses fell off - they couldn't sit well over the other pair of glasses. These clips did it. They don't scratch my lenses and when I pick them up I forget clip-ons exist. Very comfortable and good buy.