BluTech lenses. The most advanced protection from damaging High Energy blue light. High Energy blue light is emitted from every LED screen we use today....Computers, tablets, smart phones. The more time you spend on these devices, the more exposure you have to these harmful rays. The accumulation of these light rays over time can contribute to cataracts, macular degeneration and general eye fatigue. The tint color of these lenses also provides a more comfortable viewing of our devices. Watch the video below to learn more.....