Blue light exposure refers to the light emitted by digital screens, such as those on smartphones, tablets, and computers. It is part of the visible light spectrum and has a short wavelength, which means it carries more energy than other colors of light. While blue light is natural and present in sunlight, excessive exposure from artificial sources can lead to eye strain and discomfort. Research suggests that prolonged blue light exposure, especially at night, may disrupt sleep patterns by interfering with the body's production of melatonin, a hormone that regulates sleep. This disruption can affect overall health and well-being, making it important to manage screen time and consider protective measures, such as using blue light filters or glasses.