The Science

At a "glance"

  • Blue Light has the power to affect your sleep
  • Fluorescent and LED lighting in offices can cause headaches and affect concentration
  • Using over 85% Blue Light blocking lenses at night will help you get to sleep more effectively by blocking this light from screens and down-lights
  • Using 68% Blue Light blocking lenses in office environments can increase concentration and help prevent eye fatigue and headaches


The Light Spectrum


Office Lights

Exposure to harsh fluorescent lighting can cause eye strain and blurred vision. The longer you’re exposed to the light, the more likely you’ll experience the problem. Symptoms of eyestrain include sore, burning, watery or dry eyes. Double vision and increased sensitivity to light can also occur. At times, you may feel that it’s hard to keep your eyes open or concentrate on your work. Headaches are common. If you suffer from migraines, exposure to the lights may cause more frequent episodes.


The Effects on Sleep


Exposure to Blue Light from screens, LED and Fluorescent lighting will suppress Melatonin release, which is a hormone that helps you fall asleep. Research done by two different groups in 2001 found not only that blue light was the greatest inhibitor of the release of Melatonin, but also found that blue light from LED sources (the source of light on all electronic devices now) is the blue light causing the greatest problems with the release of Melatonin.

In this interesting interview with a pair of researching professors in the field, they simply state that screen time in the hour prior to going to sleep results in:

    • Taking longer to fall asleep.
    • Less amount of REM; this results in less time dreaming
    • A greater degree of sleepiness after an 8-hour sleep
    • Greater difficulty waking up after an 8-hour sleep