NoIR filters can help people minimize eye discomfort and maximize visual resolution. Filter shade number 22 - gray - allows in 11% of visible light, has 100% ultraviolet protection. As such, it heightens contrast for indoor use. This soothing color sharpens focus and provides excellent glare protection.
This Retro wrap around frame (#13) measures 130mm x 140mm x 44mm (5.12" x 5.52" x 1.74") and is designed to wrap closely around the face for close protection and light blocking. This retro frame style cannot be worn over other glasses.