What is Blue Light? Blue light has a short wavelength and is likely to scatter, causing fatigue of the ciliary muscles, which are the adjusting muscles that adjust the lens, and may cause eye strain. Blue light can cause a wide range of risks including eye strain, sleep disorders, damage to the retina, dry eyes, stiff shoulders, and headaches. For those who operate smartphones and PCs or watch TV, it is recommended to take measures immediately with blue light blocking glasses. SIGVAN blue light blocking glasses High manufacturing quality, material lightweight and durability. Block blue light, suitable for people who use mobile phones and computers for a long time. Metal spring hinges help glasses adapt to face,built-in stainless. Convenient Set of 5 means you'll have a pair handy wherever you are. Five kinds of color.You can optionally change to different color when you are in different occasion. Keep a pair in your favorite reading spots. Clear lens,No affect reading, and almost no color difference. Perfect gift for your friends, parents, grandparents and relatives. Package includes: 5 x Computer Reading Glasses,5 x Eyeglass Pouch ,Cleaning cloth Size: Lens width: 52mm/2.04in Lens height: 38mm/1.49in Bridge:20mm/0.78in Arm: 140mm/5.510in Frame width: 140mm/5.510in Material:Plastic, which has the characteristics of super lightness, abrasion resistance low friction coefficient and so on. If you have any problems with our items or services, please feel free to contact us. We will do our best to solve any problems and provide you with the best customer services. Thank you so much for support us!

CHOOSE SIGVAN :Rest assured to buy,Contact us with any questions regarding our products and we’ll be happy to help. MULTIPLE COLORS TO CHOOSE FROM :You can optionally change to different color when you are in different occasion.Elegant and colorful design for any occasion. QUALITY CLASSIC FRAME :The classic square shape frame is suitable for both male and female while covering large field of vision. With a fun and colorful design readers for a fresh look!. COMFORTABLE DESIGN :Readers with spring hinge temples ensure a comfortable fit. BLUE LIGHT BLOCKING READING GLASSES :Block blue light, suitable for people who use mobile phones and computers for a long time.Reduces eye strain & discomfort caused from long periods of reading, digital screen, computer gaming and work under fluorescent lights. CONVENIENT SET :Convenient Set of 5 blue light filter glasses means you'll have a pair handy wherever you are.There are also 5 free reader soft pouches and 1 microfiber cleaning cloth.