Ask The Optician | Optical Centre Smarbuyglasses UK

How Do Blue Light Glasses Work?

Blue-light blocking glasses have filters in their lenses that absorb blue light (and in some cases UV light), or stop it getting through. That means if you use these glasses when looking at a screen, especially after dark, they can help reduce exposure to blue light waves that can keep you awake. Some glasses (but not all) counteract the effects of blue light by tinting their user’s entire field of view yellow. This naturally accounts for sources of blue light (like screens), and renders them in softer tones. This is similar to the way that ski goggles tint their wearer’s field of vision orange to make up for the bright blue and white tones of the pistes.

 

What is Blue Light?

Blue light is a potentially harmful form of light. While it is naturally emitted by the sun, electronic devices (upon which we’re spending more and more time every day) are also high-level producers. Blue light rays at a wavelength between 415nm - 455nm can damage your retinal cells, which may lead to premature eye ageing and vision problems in the future.

Our exposure to these harmful light rays may also cause a range of other health problems, including poor sleep (according to a 2012 Harvard Medical School study). Find out more about how to protect your eyes from blue light with anti blue light glasses with zFORT®.

 

How Do Blue Light Blocking Lenses Work?

Blue light blocking glasses are created to block specific wavelengths of light to decrease glare. Wearing blue light blocking glasses while using a computer, watching television, or viewing your smartphone can decrease or eliminate the effect of the light on your bodily functions (as well as relieve eye strain).

 

We suggest you wear them:

  • On extremely bright, sunny days.

  • In the office in front of a computer monitor.

  • In spaces with fluorescent lights.

  • When a migraine feels imminent.


For more information on blue light glasses, ask our optician or get yourself a pair here!


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