I've used those flip down magnifiers that you attach to a cap brim. Work pretty good and they move up out of the way. It sucks getting old, espeially when you're trying to tie on a size 24 fly in a strong wind like yesterday! I wish I could use bigger hooks and heavier line, but would never catch a fish on the San Juan. In another month or so it'll be time to use 24s and smaller, tied to 7x (2.4 lb test) just to get them to look at it!