What is commonly referred to as 'blue light' is formed by rays of light with a very high frequency and high energy frequency, potentially harmful to our eyes. All electronic devices (computers, smartphones, tablets, televisions) emit blue light and their prolonged and constant use can cause visual stress, red and irritated eyes, headache, sleep and even damage your eyesight. The TWIG® anti-blue light glasses are equipped with lenses made specifically to absorb a high percentage of harmful rays, thus limiting the unpleasant consequences due to exposure and improving quality of our life. This is a highly recommended device for those who spend a lot of time in front of a screen or for those who use it during the evening hours. — Model: TWIG® Jager Gender: Unisex Frame: Polycarbonate added Lenses: Polycarbonate Type: Blue light TWIG® package