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What is blue light?

Sunlight contains red, orange, yellow, green and blue light rays (as shown in the prism). Violet and blue are the highest energy rays and create the most damage and glare.

Why does blue light present a threat?

The fact that blue light penetrates all the way to the retina (the inner lining of the back of the eye) is important. Laboratory studies have shown that too much exposure to blue light can damage light-sensitive cells in the retina. This could increase the risk  of macular degeneration, the leading cause of vision loss.

Many eye care providers are concerned that the added blue light exposure from computer screens, smartphones and other digital devices might increase a person’s risk of macular degeneration later in life.

Where does blue light come from?

Blue light is actually everywhere. Light from the sun travels through the atmosphere. The shorter, high energy blue wavelengths collide with the air molecules causing blue light to scatter everywhere.  This is what makes the sky look blue. In its natural form, your body uses blue light from the sun to regulate your natural sleep and wake cycles.  This is known as your circadian rhythm.  In the right doses, blue light also helps boost alertness, heighten reaction times, elevate moods, and increase the feeling of well being.

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