NoIR filters can help people minimize eye discomfort and maximize visual resolution. Filter shade number 02 ‚ medium gray green ‚provides 92% infrared protection in addition to 100% ultraviolet protection. It allows in 18% of visible light and is an all-purpose filter color with good glare reduction and natural color rendition. It also features blue blocker protection. It is often recommended for people with Diabetic Retinopathy. The fit-over style frame may be worn over most prescription frames or worn alone. It features side shields with temple lapped construction to keep out extraneous light and wind and it has curved temple pieces for a non-slip fit. The smaller frame measures 5 3/4″ temple to temple.