blue light blocking glasses/computer glasses 2 pack anti eye eyestrain unisex(men/women) glasses with spring hinges uv protection(twilight and orange) k kenzhou <br>all of our electronic devices give off excessive quantities of blue light (smart phones, tablets, laptops and desktop computers). this blue light messes with your <br>internal clock and stops your body from naturally producing melatonin, the hormone that helps us fall asleep late at night. <br> <br>k kenzhou glasses block the most harmful types of blue light helping our body keep its natural schedule. the lens with a slightly yellow can better protect your eyes and prevent fatigue.this allows you to have an optimal viewing <br>experience without the nasty yellow glare that can occur with inferior glasses. <br> <br>the lens was made of a fully transparent base, while maintaining high light transmittance. less reflective, no affect reading, and giving you get the optimal <br>viewing experience without any color distortion. <br> <br>k kenzhou glasses are essential for anyone using an electronic device daily. each lens comes with layer coating designed specifically to reduce glare, <br>reflect blue light away from the user and relieve long term eye strain caused by excess electronic device use.if you are using your phone or computer late at night <br>and have trouble sleeping you would notice a difference almost immediately when you first try k kenzhou computer glasses.just anti-blue glasses,not anti-blue reading glasses.only minimal yellow tinting,just a pain free screen experience that lasts all day! <br> <br>please note: the cleaning cloth of blue light blocking glasses will have a little fade.