Red Lenses Blue Green Light Blocking Glasses for Better Sleep R2512-R100 Color:Black these customizable reading glasses allow

these customizable reading glasses allow you to select different lens powers for your left and right eye

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

durable hinge that snap back perfectly every time

Bridge (DBL) about 7/8 (22mm)

Bridge (DBL) about 11/16 inches (18mm)

Red Lenses Blue Green Light Blocking Glasses for Better Sleep R2512-R100 Color:Black these customizable reading glasses allowIdeal for nighttime screen use, late night reading, or pre sleep relaxation, these glasses protect your eyes and help you fall asleep faster and wake up refreshed. Metalless & 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