Why do we need to fight with blue light ? The visible light wavelength at 415-455 mm is called harmful Blu-rays, and long-term irradiation can cause visual fatigue to decrease, common in computer, TV, mobile phone, games, iPad, watch. Blue Light Blocking Reading Glasses Package Include 1*silver blue light reading glasses with case 1*folding reading glasses with case Folding Reading Readers Features ProJoyJoy reading glasses is on the forefront of eyewear fashion,silver and golden combination ideal for both men and women. Blue light blocking:anti 90% harmful blue light,relieve eye fatigue and discomfort from long periods of web surfing and working. UV 400 to protect the eyes from ultraviolet rays. Clear vision/true color Foldable design for easy carry Read more