These classic mountaineering glasses are designed to prevent light entering your eyes from any direction other than through the frames lenses. One of the main optical features is that the frame and lenses are flat allowing for high power prescriptions. CAT 4 ‘dark’ lenses provide the maximum in light blocking.
The glasses are fitted with side light shields and cup type seal to prevent light from entering from above or below the frame. Perfect for Polar trekking and mountain climbing.
RX Range +4.00 to -3.50 with opposite cyls. to 3.00