【DUAL ANTI-BLUE LIGHT TECH】 - Block 95% of blue light( wave length 415-445nm) with Double Filters - built-in anti-blue light element and specular coating. That means if you use these bluelight blocker glasses when looking at a screen, especially after dark, they can help reduce exposure to blue light waves which cause headache or eyesore 【CLEAR LENS FOR UNBIASED COLOR】 - FRETREE computer glasses, with high light transmittance up to 93%, won't affect your reading in unbiased color. Adopting TAC multi-coated technology, it can block strong blue light and alleviate visual fatigue from long period of web surfing, gaming and working 【UPGRADED FRAME FOR COMFY WEARING】 - Adopting highly pliable TR90 frame, along with ergonomic nose pad and Anti-slip design, the blue light blocking glasses fit perfectly for any faces, comfortable for long-term wear