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and Dr. Thomas Jay Yung

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Home » Article Library » What is Blue Light Hazard?

What is Blue Light Hazard?

What is Blue Light Hazard?

If you use a lot of electronic devices like TVs, computers, smartphones and tablets, and have LED lighting, you are exposed to blue light or high energy visible (HEV) light.
Blue light is part of the visible light spectrum that can potentially damage the eyes and cause digital eyestrain.  Blue light exposure after sundown may also disrupt sleep cycles.
Blue light's shorter wavelength creates light scatter within the eye, causing glare and eye fatigue.  Blue light penetrates into the eye and potentially damages retinal cells.  Cumulative lifetime exposure can increase risk of age-related macular degeneration.   The lens in a child's eye filters blue light less efficiently than an adult lens, thus children are more sensitive to blue light hazard.
What can you do?
At night, use dim red lights for night lights.
Avoid looking at bright screens at least two hours before bed.
If you or your kids use a lot of electronic devices, wear blue blocker glasses.
New lens coatings for glasses block out hazardous blue light and can be used indoors to reduce eyestrain when looking at digital screens.   Hoya's Recharge lens coating reflects harmful blue light away from the eyes and reduces free radicals and risk of eye disease.   It also enhances contrast and night vision.  
Ask Dr. Dianna Leong and associates at Foresight Eyecare for more information.

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