it will be change to grey color in the sunshine within 10 minutes

and unmatched clarity to allow you to see more details

memory titanium frame without spring hinges

Lens height: 1 7/16 inches (37mm)

Head Size: Medium

4 Pack Cool Modern Bifocal Reading Sunglasses SBR2108 Magnification Strength:+1.50 it will be change toPlastic frame with spring hinges Frame width about 5 7 16 inches (138mm) Lens width about 1 7 8 inches (48mm) Lens height about 1 9 16 inches (40mm) Bridge (DBL) about 1 2 inches (12mm) Temple length about 5 5 16 inches (135mm) EYEKEEPER BIFOCAL SUNGLASSES A crescent shape on the bottom part of the lenses have magnification, which is for reading and close up work. And the other parts of the lenses have no magnification,which is for distance viewing.