If you're having trouble seeing your leader and fly hook, try Flip Focals. They make close, precise work like fly tying and threading much easier. Flip down for use, then up and out of the way while fishing. Clips on to any hat brim (hat not included).
2.25X
L-P CLIP WITH LOCKING PIN & SNAP
GREAT FOR ALL YOUR FLY-FISHING and FLY-TYING NEEDS
VERY LIGHTWEIGHT