Rectangle Blue Light Blocking Eyeglasses for Kids TMK1802 Butterfly The performance of blue light

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

Lens width about 2 3/16 inches(55mm)

Temple length about 5 1/2 (140mm)

Insures optical clarity

Ready for who need them - We started making this product in order to meet the needs of people who farsighted with different diopters in each eye

Rectangle Blue Light Blocking Eyeglasses for Kids TMK1802 Butterfly The performance of blue lightAcrylic lens, metal frame with spring hinges Block 60% blue light, 20% color distortion Frame width about 4 15 16 inches (125mm) Lens width about 1 7 8 inches (47mm) Lens height about 1 1 16 inches (27mm) Bridge (DBL) about 9 16 inches (15mm) Temple length about 5 1 8 inches (130mm)