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What’s the latest thinking on HEV blue light?

Chances are you’ve read or heard about the potentially harmful ocular effects of high-energy visible (HEV) blue light. The topic has been a popular one among industry experts. But what do the most recent research tell us? And what is the most effective way to limit blue light exposure?


HEV blue light is a part of electromagnetic radiation that can be seen by the human eye and includes wavelengths ranging from 380 to 500 nanometers (nm). By far the most potent source of blue light is the sun. However, in today’s world, extensive and sustained use of computers, tablets, smart phones and other digital devices that have luminous LED displays, contributes in an increasing fashion to overall exposure.


HEV blue light has the potential to cause photochemical changes in the ocular tissue which may ultimately lead to structural and functional damage. Yet, there are many aspects of HEV blue light radiation for you to consider before you can offer your customers an informed opinion.


 A new technical whitepaper prepared by Hoya Vision Care titled, What We Know – And Don’t Know – About Blue Light, collects some of the most recent peer-reviewed research and provides fact-based guidelines for recommending eyewear that provides proper filtration. 


  • Did you know that in the eyes of a young child, more than 65% of blue light passes through to the retina as compared to just 1% to 40% for older adults?
  • Did you know that exposure to blue light from digital devices well into the night reduces the secretion of melatonin which affects the ability to fall asleep?
  • Did you know that prolonged exposure to blue light may decrease the ability of the macular pigment to protect the eye from retinal degenerative changes and damage?


To learn more about HEV blue light and its impact on eye health, click here to receive a complimentary copy of Hoya’s technical whitepaper.