What is blue light? | Blue light (HEV light) emitted from screens of smartphones, tablets and computers has come into focus as one of the causes of: digital eye strain, headaches, disrupted sleeping patterns. Digital devices emit a large amount of high-energy shortwave blue light with irregular frequency can cause vision problems. Your eyes are sensitive to a narrow band of frequencies referred to as the "visible light spectrum". Blue light is the strongest light within the visible ray spectrum with wavelength from 380nm to 495nm. The powerful energy of blue light can directly reach the retina and harm your eyes. CLICK HERE  - CARE.+ PRODUCT VIDEO >>