Blue light is a high-energy visible light that comes from natural sources such as the sun as well as artificial sources like LED lighting and digital screens. In recent years, increased exposure to digital devices has raised questions about how blue light may affect visual comfort and long-term eye health.
Although blue light is a natural part of the visible light spectrum, prolonged exposure from screens can contribute to visual fatigue and discomfort for some individuals.
What Is Blue Light?
Blue light is a short-wavelength, high-energy light that is part of the visible light spectrum. Because of its higher energy level, blue light scatters more easily than other wavelengths, which can influence visual contrast and clarity.
Sources of Blue Light
The largest source of blue light is sunlight. However, artificial sources have become more common in everyday life. Digital screens, smartphones, tablets and LED lighting all emit small amounts of blue light.
Blue Light and Digital Screens
Extended screen time can contribute to visual fatigue, dry eyes and discomfort. Many people experience symptoms commonly associated with digital eye strain after long periods of screen use.
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