What's the Blue Light?

Blue light is part of the visible light spectrum – what the human eye can see. Vibrating within the 380 to 500 nanometer range, it has the shortest wavelength and highest energy.

About one-third of all visible light is considered blue light. Sunlight is the biggest source of blue light. Artificial sources of blue light include fluorescent light, LED TVs, computer monitors, smartphones, and tablet screens.

Unlike other forms of light, the eyes cannon effectively filter blue light, so more can pass through the eye to the Retina.  Blue light produces both benefits and concerns for our eyes and overall health.

Blue-vioet wavelengths between 380 and 440nm are considered potentiallt damaging and have been implicated as one of the possible causes of photoretinitis, damaged to the Retina caused by high-energy incident light - a conclusion of German Research Institute.

Constant exposure to blue light over time could damage retinal cells and cause vision problems such as age-related macular deggeneration.

According to a vision study by the National Eye Institute, children are more at risk than adults because their eyes absorb more blue light from digital devices.