The performance of blue light blocking:block 35% within 500nm

Bridge(DBL) about 1/2 inches(12mm)

PROTECT YOUR EYES - Anti glare lens coating prevents insomnia and macular degeneration

To avoid damage

Lens width about 2 inches (50mm)

Fancy Blue Light Filter Eyeglasses BC1901-BB40 feed-color-Black/Pink/Brown The performance of blue lightAcrylic lens, plastic frame with spring hinges Block 40% blue light, almost no color distortion Frame width about 5 1 2 inches (140mm) Lens width about 2 1 16 inches (53mm) Lens height about 1 11 16 inches (42mm) Bridge (DBL) about 1 2 inches (12mm) Temple length about 5 1 2 inches (140mm)