NoIR filters can help people minimize eye discomfort and maximize visual resolution. Filter shade number 22 - gray - provides infrared protection in addition to 100% ultraviolet protection. It allows in 11% of visible light and is an all-purpose filter color with good glare reduction and enhanced visual acuity. It also features blue blocker protection. It is often recommended for people with Diabetic Retinopathy, Glaucoma or Cataracts.
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").