Red Lenses Blue Green Light Blocking Glasses for Better Sleep NR9107-R100 Color:Red Lens width about 2 1/16

Lens width about 2 1/16 inches (52mm)

and avoid using paper

Lens height about 1 15/16 inches (49mm)

visual discomfort

or daily digital use

Red Lenses Blue Green Light Blocking Glasses for Better Sleep NR9107-R100 Color:Red Lens width about 2 1/16Metalless & Screwless: No screws, no metal just flexible, durable hinge that snap back perfectly every time. Strong screwless hinges no worries about breaks or lost pieces. Ultimate Blue and Green Light Blocking: Red lenses filter out 100% of sleep disrupting blue and green light. Product Dimension: Frame width about 5. 39 inches (137mm), Lens width about 1. 97 inches (50mm), Lens height about 1. 46 inches (37mm), Bridge (DBL) about 0. 51 inches