Proving very popular with orienteers requiring some eye protection & magnification
Full glasses with FLAT top bi-focal magnifier in lower part of lens, cutout in lens helps reduce misting up of lens.
Supplied with a clear lens
Polycarbonate lens for good protection when running in the forest etc.
Diopter strength: 1.0, 1.5, 2.0, 2.5, 3.0