The eye's cornea and lens aren't good at filtering HEV light from reaching our retina, the thin layer of light-receiving tissue that lines the back of the eye. Over time, this can cause damage to its light-sensitive cells. As we age, this damage can make us more susceptible to eye diseases such as macular degeneration and cataracts. Young children are even more sensitive to blue light exposure since the lens of their eyes are even more transparent than adults, allowing more HEV light to pass through. A scientific explanation is because High Energy Visible (HEV) light has such a short wavelength, it scatters in the eye, reducing contrast and making it difficult to focus. Over time, our eyes begin to feel tired. It can also cause pain in or around the eyes, blurred vision, headache, or sometimes even double vision.