Womens sunglasses uv protection uv400 lens coatings iridium polarised lens properties natural vision lens shape trapezoid shape of glasses cat eye face shape oval angular shaped frame type full framed frame material o matter frame characteristics three point fit nose bridge material unobtainium frame colour grey lens colour grey area of use bright light temple length 139 mm lens width 53 mm lens height 42 mm bridge width 17 mm transparency