Urban Optique
4935 40 Ave NW #132 Calgary AB T3A 2N1 (403) 286-4142

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Calgary, AB


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High Energy Visible Light (HEV Light)

Known as “Blue Light” on the visible light spectrum,  HEV Light has a wavelength between 380nm and 500nm. It is the one of the highest-energy wavelengths that the human eye can detect, therefore having a unique composition of dangers and benefits to your eyes and health.
HEV Light is anything but a rare occurrence – we are surrounded by it constantly.   In addition to coming from the sun, HEV Light also enters your eyes from computer monitors, TVs, smart phones, tablets and other electronic devices.  

HEV Light’s Impact On Your Eyes

Overexposure to HEV Light can cause or accelerate certain eye conditions.  With our constant, everyday use of electronic devices in modern times, the impact of HEV Light on our eyes is being seen in increasing numbers and severity; the most common condition being Digital Eye Strain.

Digital Eye Strain

Symptoms of Digital Eye Strain include:

  • Blurred vision
  • Difficulty focusing
  • Eye fatigue/irritation
  • Headaches
  • Neck and lower back pain

Macular Degeneration

Overexposure to HEV Light can also accelerate the effects of a pre-existing macular degeneration condition.  This is an eye condition which deteriorates the retina in the same way HEV Light can, potentially leading to blindness.  

Good Health

It may come as a surprise that something that can cause damage to your eyes can also be good for you.  In the right amounts, HEV Light is essential to good health – it can boost alertness, memory, other important cognitive abilities and can even put you in a better mood.  It would not be in your best interest to block all exposure to HEV Light!

Living With HEV Light

The requirement to use electronic devices has become an fundamental part of our everyday, modern lives.  This is not likely to change, and exposure to the sun is both inevitable and necessary for life.   So, how can we live with HEV Light without experiencing any of its negative effects?  Below are some simple and cost effective recommendations:

  • Use HEV Light Filters on your devices.  These thin layers of plastic or tempered glass can be put over the screens to block a significant amount of HEV Light without compromising the visibility of the display.  They can be found at any store that also sells the devices.
  • Use eyewear made for blocking HEV Light.  There are eyeglasses and contact lenses on the market which are coated in anti-reflective materials to block HEV Light.   Some of this eyewear is specifically made for looking at the computer monitors, while others are also made to serve all purposes.

Use the “20/20/20 rule”.  Every 20 minutes, look at something at least 20 feet away, for at least 20 seconds. This ensures that your eyes are given enough of a rest from looking at HEV Light sources, subsequently mitigating long-term damage to your eyes.

Written by Russ Reisner

Dr. Reisner and Dr. Kuntz (who is also Dr. Reisner’s uncle) acquired and expanded Urban Optique into its current location in 2006 and 2007. Dr. Reisner was born and grew up in Limerick, Saskatchewan – a small farming community about an hour south of Moose Jaw. After attending the University of Saskatchewan he earned his degree in Optometry from Indiana University in 2001. Dr. Reisner is very proud of everything he and his colleagues have accomplished.

More Articles by Russ Reisner

Our Location

Located on the main floor of the Market Mall professional building. Providing eye exams, in-stock contact lenses and over 2,000 frames from over 40 brands of eyeglasses. Free parking is available for this Northwest Calgary location.


4935 40 Ave NW #132
Calgary AB, T3A 2N1

Contact Information

  • Monday: 9:00am - 6:00pm
  • Tuesday: 9:00am - 9:00pm
  • Wednesday: 9:00am - 9:00pm
  • Thursday: 9:00am - 6:00pm
  • Friday: 9:00am - 6:00pm
  • Saturday: 9:30am - 5:30pm
  • Sunday: Closed
  • Dr. Russ Reisner
  • Dr. Harvey Kuntz
  • Dr. David Schmidt
  • Dr. Pri Tawar
  • Dr. Nevin McIvor
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