Phones contains blue, high-energy light that can harm the eye. It can affect the eyes if the screen is brought close to the eyes or after long-term or continued exposure from blue-light screens. Although not comparable to ultraviolet ray light effects, continued and prolonged exposure to blue light can damage the cells of the retina and cause eye diseases like age-related macular degeneration. Blue light can also affect sleep patterns if used just before bedtime. It causes eyestrain, painful headaches, blurred vision, irritation, and dry eye as a result of less blinking. According to the National Eye Institute, children are more likely to absorb more blue light than adults.