What is Blue Light?

July 29,2021

Blue light is part of the visible spectrum and is emitted by the sun and artificial light sources, including digital screens and fluorescent lights.

Blue light refers to a series of wavelengths on the visible spectrum, including different shades of red, orange, yellow, green, and blue light emitted from the sun. The red end of the visible spectrum has longer wavelengths up to 700 nanometers and relatively low energy levels. The other end of the spectrum is high-energy blue light, with wavelengths as short as 380 nanometers and as long as 500 nanometers. In addition to visible blue light, there is also ultraviolet (UV) that is invisible to the naked eye. Its wavelength is even shorter than blue light and has higher energy.

The sun is the main source of blue light, but blue light can also be emitted from sources such as digital screens and fluorescent lights.

EUGENIA blue light glasses and reading glasses can filter at least 30% of potentially harmful blue light. In addition, all blue light models have 100% UVA-UVB lens protection.