VizoBlueStop blue light protector for computer monitor blocks 60% of the harmful wave length of blue light between 380nm~480nm and also blocks 100% of UV light. Scientists have proven that when we are exposed to too much of the harmful blue light this may lead to insomnia, obesity, depression, eye redness and even cataract, and myopia. This underlines your eyes and body will be healthier and better protected when you have put the blue light protector of VizoBlueStop. It will help your eyes feel more relaxed, less red and tired after spending the whole day working in front of the monitor. The protector will also improve your circadian rhythm because VizoBlueStop blocks the harmful blue light and improves your sleeping patterns. VizoBlueStop does not distort the quality of the TV picture or colors. It is 100% transparent. The installation is easy: you simply hang the protector on top of your monitor and it is ready to be used. If necessary, you can add some Velcro strips for extra secure attachment. These are provided in the installation package. Blocks Harmful Bluelight between 380nm~480nm. The Best Anti Blue-Light optical grade product