Blue light: is it harming my vision? - Cameron Optometry | Cameron Optometry
Blue light: is it harming my vision?

Blue light: is it harming my vision?

Posted on 20th October 2016

What is it and why is it important?

The visible light that our eyes can see is composed of a spectrum of colours, just like a rainbow. Sunlight consists of the entire spectrum of light so we are exposed to the blue light part of the spectrum every time we are outside. Increasingly our eyes are exposed to additional sources of blue light when we are indoors as well. These sources include the backlit displays of our handheld digital devices and TV screens, as well as LED and compact fluorescent light bulbs. By 2020, 90% of all of our light sources are estimated to be LED lighting.

Is this a bad thing?

We can think of good and bad blue light. The shorter the wavelength of light the more energy it contains, the more discomfort it can cause us. We need exposure to the good, longer wavelength, blue light as it helps to regulate our moods and our sleep patterns as well as aiding our memory. However, the high energy of the short wavelength blue light creates flicker that reduces our contrast vision and causes glare.

This can be tiring for the eyes, more so over prolonged periods, causing symptoms such as tiredness, dryness, blur and headache. Blue light exposure in the evenings may also interfere with how well we sleep. It is understood that repeated exposure to blue light can cause degeneration of some important cells for vision on the retina at the back of the eye.

What can I do to address the problem?

Outdoors, sunglasses with the correct tints or coatings are perfect for protection from blue light. Indoors, there are now spectacle lenses designed specifically for this purpose. Blue light filtering lenses block out the harmful wavelength blue light and let the good blue light through.

Results have shown that for people experiencing symptoms that the lenses help their eyes to feel less gritty and dry and that other symptoms of eyestrain were reduced by half. Wearing them in the evenings when at the computer or watching television, makes a notable difference, with the eyes feeling less tired. While blue light filtering lenses look clear, lenses with yellow tints can also block the blue light and help with symptoms experienced when looking at blue light sources through the day.

If you are concerned about the effects of blue light on your vision, please discuss them with optometrists.

 


Related Posts

Welcome to our fifth optometrist, Rebecca Daly

17th June 2019

We recently welcomed a fifth optometrist to the practice. Rebecca joins with an impressive background in eye care and we know she will be a hugely valuable addition to the team. Originally from Mullin...

Read more

Lesley and Heather celebrate a quarter century at Cameron Optometry

21st March 2019

This year marks 25 years with the practice for Lesley Kerr and Heather Grandon. The loyal and dependable duo have been at the heart of the practice for a quarter century, a period when the practice ha...

Read more

Welcome to Hemp Eyewear, designed and made in Edinburgh

27th February 2019

We are delighted to welcome Hemp Eyewear to the Frame Room this month. Proudly unconventional: the materials, the process, the design and the look. This is such an exciting brand on so many levels.  ...

Read more

Cosmetic lenses created for our patients (and for Hollywood blockbusters)

19th February 2019

Heather Muir and Heather Grandon headed south to Hemel Hempstead to Cantor & Nissel, the company we use to manufacturer cosmetic lenses for our patients. We have used the company for many years, c...

Read more