Customized Sunglasses & Straps, Blue Light Blocking Glasses - UV400 Protection, Lenses feature ultraviolet protection level UV400 (100% UV) ABS plastic frames and Polycarbonate lenses Adult-size Blue Light Blocking glasses Wearing these can help limit eyes from exposure to blue light (mostly found in technology items such as phones, tablets and computers) which can cause strain to the human eye The wavelength of blue light can be harmful to the retina (generally discomfort) and can even affect sleep Product Size: 5.7" w x 2" h x 6" d Deco Eligible ... #SG260 $2.66/each.