COJWIS Ladies Reading Glasses Blue Light Blocking Spring Hinge Fashion Pattern Print Eyeglasses for Women (Mix Color, 2.50, multiplier_x)

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...