Limiting Exposure to Blue Light

What Is Blue Light?

Blue light is part of the visible light spectrum and is considered HEV, or high-energy visible light.


Image source: www.zeiss.com

As indicated in the graphic above, blue-turquoise light is important for helping influence the body’s clock for being awake and sleeping. Light from a little farther up the spectrum, however, can have negative effects. Continued exposure to blue light is thought to contribute to damaged retinal cells. Such damage can cause AMD, or age-related macular degeneration. AMD is a deterioration or breakdown of the macula, a small area in the retina that allows you to see fine details clearly.

The largest source of blue light is sunlight. Other sources include:

  • Fluorescent lights
  • CFL (compact fluorescent light) bulbs
  • LED light
  • Flat screen LED televisions
  • Computer monitors, smart phones, tablet screens

Lenovo Vantage Eye Care Mode

Understanding the potential dangers of blue light, Lenovo Vantage developed an "Eye Care Mode" tool that reduces the blue light emitted from LEDs widely used in today’s PC monitors.

How to use Eye Care Mode in Lenovo Vantage:

  1. Search "Lenovo Vantage" using your Windows operating system search function (in the Start menu or task bar, lower left corner of your computer).
  2. Click "Lenovo Vantage"
  3. Click the "Hardware Settings" button on the main page, then select "Audio/Visual"
  4. In the "Eye Care Mode" section, when a user turns on the "Eye Care Mode" toggle, blue light emission will be reduced to a more comfortable level and the slide bar cannot be moved. If user turns off the "Eye Care Mode" toggle, blue light emission will return to the last value the user set.
  5. The user will be able to slide the bar to adjust the blue light emission level when the "Eye Care Mode" toggle is turned off. Sliding the bar to the left results in a warmer screen color and to the right a colder screen color.

If you do not have Lenovo Vantage software, please download it from the Microsoft Store and install it.

You can download the old version of this tool (Lenovo Vision Guard) here.

TÜV Rheinland has awarded Lenovo with the world’s first low blue light certificate for all-in-one desktop computers.



Accessing Lenovo Vision Guard Control if your PC has the software preloaded:
Windows 7: Windows icon (lower left corner of desktop screen) → All Programs → Lenovo → Lenovo Vision Guard Control
Windows 10: Windows icon (lower left corner of desktop screen) → All Apps → Lenovo → Lenovo Vision Guard Control
Windows 7/10: Computer → Local Disk (C:) → Program Files (x86) → Lenovo → Lenovo Vision Guard Control → Lenovo Vision Guard Control.exe

Health Recommendations

Please avoid looking at your screen and holding the same posture for extended periods of time. We recommend changing posture frequently and looking away from your screen occasionally in order to stay relaxed and reduce eye strain. Take a short break at regular intervals (e.g. every hour) to reduce physical fatigue.

CAUTION:

Looking at a screen for extended periods of time may cause eye strain or damage.



References:

American Academy of Opthamalogy, https://www.aao.org/eye-health/diseases/amd-macular-degeneration.
Behar-Cohen F, Martinsons C, Viénot F, Zissis G, Barlier-Salsi A, Cesarini JP, Enouf O, Garcia M, Picaud S, Attia D, “Light-emitting diodes (LED) for domestic lighting: any risks for the eye?”, Progress Retinal Eye Research 30(4) (July 2011): 239-57.
Zheng Xiaohang, “Comparison Test between All-in-One Computer with and without Lenovo Vision Guard Control Software”, Lenovo Desktop Optical Laboratory, 2016.