Width of the forehead frame: 13

tr90 frame with spring hinges

Bridge(DBL) about 1/2 inches (13mm)

BLOCKING OVER 30% BLUE LIGHT - Blue light blocking technology naturally blocks out the recommended 30% of blue light rays: do not settle

UV400 protective bifocal readers and block 100% UVA-UVB harmful rays for superior eye protection

Stylish Blue Light Blocking Eyeglasses LX19021-BB90 feed-color-Black/Brown Width of the forehead frame:Acrylic lens, metal frame with spring hinges Block 90% blue light, 30% color distortion Frame width about 5 3 16 inches (132mm) Lens width about 2 inches (50mm) Lens height about 1 9 16 inches (40mm) Bridge (DBL) about 1 2 inches (13mm) Temple length about 5 5 16 inches (135mm)