NoIR fit-over style filters can help people minimize eye discomfort and maximize visual resolution. Filter shade number 23 - extra dark gray - provides infrared protection in addition to 100% ultraviolet protection. These sunglasses allow in 4% of visible light. They are a comfortable color which cuts glare, sharpens focus, and provides natural color rendition. This filter has been recommended for those with Retinitis Pigmentosa.
This standard large fit-over style frame may be worn over most prescription frames or worn alone. The entire body of these fit-over sunglasses are made out of this same filter color. 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.
Large size (#L) measures 150mm x 148mm x 56mmm (5.91" x 5.83" x 2.21").