NoIR filters can help people minimize eye discomfort and maximize visual resolution. Filter shade number 50 - yellow - provides 100% ultraviolet protection. It allows in 87% of visible light which heightens contrast with maximum brightness. It also features blue blocker protection.
This clip-on style lens can be attached to an existing pair of glasses and flipped up when not in use. Lens measures 132mm x 52mm (5.20" x 2.05").