Fisherman Eyewear at SunglassNook.com

polarized lens with magnifiers, allows you to tie knots, read small print on maps or navigational electronics without switching to glasses or magnifiers, won't interfere with your vield of view

Product Reviews
This is the second pair of these sunglasses I've had. I left the first pair in a taxi and liked them so much I replaced them. Since they don't have a frame at the bottom, the line of sight when looking down is not disrupted at all. They are so light they stay on your head even when looking down without any extra straps or other mechanical means. I've used them for fishing, driving, just about everything. The bi-focal is low enough in the vision it's out of the way normally, but it's right there when looking down to read a map or tie a knot. The bi-focal blends with the rest of the lense and isn't noticeable unlike many other bi-focal sunglasses. The only suggestion I would like to make is that it would be nice if the case had a loop on it for attaching to belt, backpack, etc.