Special interchangeable photochromic lenses with reading area. Designed for people with short sighted vision,These lenses have a light transmission of 85-17%,The brighter the light, the darker the lens automatically becomes. One lens provides you with category 1, 2 & 3 levels of eye protection,Polycarbonate photochromic lens. 100% UV protection,Lens shape gives protection sunlight, dust and wind,Hi-impact PC frame with adjustable rubber nose piece,Available in: +1.5, +2.0 and +2.5,Includes protective pouch.