Exposure to blue light at night could be harmful to your health

Font Size:

Exposure to blue light at night, emitted by computers, tablets and phones at night, can be harmful to your health.

Last year, the Sleep Health Foundation released a report that found two in five Australians were sleep deprived, and one of the leading causes was increased exposure to blue light.

According to the report, “that light wreaks havoc on your body clock and is the reason many people struggle to get to sleep at night after sending emails or watching a movie on their laptop.”

Research has also shown that blue light may contribute to the causes of cancer, diabetes, heart disease, and obesity.

Interestingly, the devices emitting blue light are only disruptive at night. During the day, blue light boosts attention, reaction times, and mood.

Research has found that exposure to blue light suppresses the production of melatonin, a hormone that influences circadian rhythms, more than any other type of light. It is believed that the shorter wavelengths in blue light are what causes the body to produce less melatonin because the body is more sensitive to this type of light.

A study by the University of Toronto found that those who wore glasses that blocked blue light wavelengths produced more melatonin than those who didn’t during night shifts.

I have been wearing glasses with a blue-light filter since November and was able to notice the difference immediately. Admittedly, I consider myself a bit of a night owl at the best of times, but in the first week of wearing the Exyra glasses, I noticed myself becoming tired much earlier in the night than usual.

The quality of my sleep has also improved, rarely stirring throughout the night (hot summer nights excluded, of course).

As well as investigating blue-light filtering glasses to counter the effects of all our night-time screen watching, experts also recommend dim red lights for night lights as they do not suppress melatonin as much.

You can also try to avoid looking at bright screens in the two to three hours before you go to bed.

Experts also suggest exposing yourself to lots of bright light during the day, which will boost your ability to sleep at night.

Do you have problems sleeping at night? Have you tried blue-light filtering glasses or decreasing your screen time before bed? Has it worked for you?

DISCLAIMER: The author was provided with a sample pair of Exyra blue-light filtering glasses for the purposes of writing this article.


Four fruits with huge health benefits

As we emerge from winter, the fruit options grow; so here are four of the best.

Report finds 7.4 million Aussies suffer from inadequate sleep

Millions are failing to get the sleep they need to live healthy, happy lives.

This is what healthy people do before bed

Improve your day with these smart sleeping habits practiced by healthy people.

Written by Ben


Sign-up to the YourLifeChoices Enewsletter

continue reading


How to boost your gut health and immune system this winter

A healthy gut is key for overall health, and affects so much more than just our digestion. With links to...


Things people who grew up in the '70s will remember

If your childhood or teen years happened to fall in the 1970s, you probably have a lot of fond memories...

Food and Recipes

The favourites that send food lovers pie-eyed

Pies, pies, pies. For some of us it's the flaky pastry and gooey filling. For others, it's the firm shortcrust...


How much of a risk are microplastics?

Perhaps you've seen headlines saying we consume a credit card's worth of microplastics a week, or that microplastics have been...


Friends, family and Aunty Maud

Columnist Peter Leith has always been one to take time to talk, lobby and observe. In this true short story,...


Podcast with leading Melbourne podiatrist

They take you thousands of kilometres, but we probably look after our car tyres better than we look after our...


Travel SOS: When will cruising restart in Australia?

With the travel bubble between Australia and New Zealand set to reopen, will we see cruising restart earlier than expected?...


Air New Zealand's blueprint for post-COVID travel

Air New Zealand's trial a digital health pass on flights to Australia could be the blueprint for future digital 'vaccine...