Cat-eye Blue & Green Light Blocking Glasses Red Lens Sleep Glasses R2514-R100 Color:Black Q2: Will they damage my

Q2: Will they damage my sunglasses

Lens width about 1 5/8 inches (42mm)

With 12 pairs included

Q3: What strength should I choose

Q5: How long do the lenses last

Cat-eye Blue & Green Light Blocking Glasses Red Lens Sleep Glasses R2514-R100 Color:Black Q2: Will they damage myIdeal 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