4 Pack Rimless Blue Light Filter Bifocal Readers BRL2UV

Polycarbonate lens, metal frame without spring hinges Block 40% blue light, almost no color distortion Frame width about 5 5/16 inches (135mm) Lens width about 2 1/16 inches (52mm) Lens height about 1 1/8 inches (29mm) Bridge(DBL) about 11/16 inches (17mm) Temple length about 5 9/16 inches (142mm) EYEKEEPER BIFOCAL GLASSES - 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.