MEASUREMENT:Lens width:52mm(2.05in),Bridge:17mm(0.67in),Arm:140mm(5.51in), Frame width:135mm(5.31in),Frame height:38mm(1.50in). Blue light Blocking Glasses for Women - Anti Blue Ray & UV: Anti harmful blue light, provide all-day protection, against the detrimental effect high energy visible blue light and UV400.
BLUE LIGHT BLOCKING EFFECT: ①Avoid macular degeneration and cataracts-resistance to blue light damage to human lens and photoreceptor cells. ②Anti-fatigue-Avoid deepening your vision and relaxing your eyes. ③Sleep better-Avoid blue light to inhibit melatonin secretion to promote sleep and adjust for jet lag.