The average person in the US spends 4 hours, 37 minutes per day looking at their phone, according to a December 2023 study. Globally, a January 2024 report stated that users aged 16 to 64 spend an average of 6 hours, 40 minutes on the internet per day. That is way more than the less than two hours per day (outside of work) that experts recommend.
All that screen time can come with side effects such as headaches, eye strain, insomnia and more, which is why many turn to blue light glasses to try to protect their vision while on devices. Nowadays, their are many different blue light glasses brands to shop from, including Felix Gray and Peepers. You can get blue light lenses for your prescription glasses, too.
However, do blue light glasses actually work and make a difference for those of us who stare at screens for several hours? The answer isn’t as straightforward as yes or no.
What is blue light?
All visible light we humans see contains the entire spectrum of the rainbow, from red to violet. Within that spectrum are blue light waves, which are said to help us stay alert and upbeat.
Read more: Tired of Eye Strain? Here’s How Optometrists Say to Beat It
Blue light glasses from the brand Felix Gray.
Blue light and sleep
Light affects your circadian rhythm. In the morning, light signals to your body that it’s time to wake up, which is why you tend to be more alert during the day. Blue light affects your circadian rhythm since it blocks the production of melatonin (the sleepy hormone). At first glance, the screens on our electronic devices may not seem blue, but they do actually emit short blue wavelengths. If you’re an avid nighttime social media scroller or an evening gamer, you’re essentially telling your brain that it’s time to stay awake instead of winding down for sleep.
Blue light does have its positive attributes. Since it makes you feel more alert, blue light therapy is used for those suffering from unexplained fatigue or seasonal affective disorder, a type of depression. It may help those with memory loss and is believed to improve cognitive function. When the sun goes down, the lack of light signals our bodies to start producing melatonin, the hormone responsible for making us fall asleep.
Read more: Best Melatonin Supplements of 2024
Before the advent of artificial light, the sun regulated our sleep schedules. Today, we’re exposed to light all day and into the night. While exposure to any light waves after dark delays our body’s production of melatonin, blue light waves can be especially problematic because they keep us alert. On the other hand, blue light can help us overcome sleep issues by resetting our off-sync circadian rhythm.
Is too much screen time bad?
The short answer? Probably.
Doctors and researchers are largely focused on two issues that arise from our ever-growing screen time: digital eye strain and blue light exposure.
According to the American Optometric Association, digital eye strain is “a group of eye- and vision-related problems that result from prolonged computer, tablet, e-reader and cell phone use.” Those issues range from blurry vision and dry eyes to headaches and neck pain.
By staring at screens all day, we’re also exposed to blue light waves, which are said to cause a myriad of issues. There is conflicting evidence about how blue light exposure affects your eyes, but doctors and researchers agree that it does affect your circadian rhythm.
What does my screen have to do with this?
Compared to fluorescent and incandescent bulbs, LEDs can give off a significant amount of blue light. Unfortunately for those of us who cozy up to our tech after sunset, LEDs are used in countless smartphones, tablets and TV screens. Tech products that have an LCD screen, like laptops, iPads and older iPhones, still use LEDs to backlight their displays.
Tips to manage blue light before bed
These are some practical ways to reduce exposure to blue light before bed:
- Wrap up work at least three hours before bed.
- Turn off any overhead lights right after dinner to keep your room dim.
- Put your phone on do not disturb mode to minimize blue light disruptions.
- Put away any electronic devices like your phone or television 30 minutes before you go to bed.
Is blue light bad for your eyes?
Blue light has been linked to all sorts of issues, from causing digital eye strain to making us blind. There’s a lot of conflicting evidence about exactly how harmful it really is.
The American Academy of Ophthalmology says that there’s no evidence that the blue light specifically given off by screens will cause eye damage, as we are exposed to blue light all day from the sun.
Peepers offers colorful blue light glasses.
Talking to CNET, Dr. Raj Maturi, a clinical spokesperson for the American Academy of Ophthalmology, explained, “During the day, you get 10 times as much blue light from the sun as you do from your computer screen. Our bodies have evolved to deal with this light.”
Research compiled by the AOA indicates that prolonged exposure to blue light (such as sitting in front of a computer all day) might cause damage to your retina — the innermost layer of your eye that sends signals to your brain to process what you are seeing.
Prevent Blindness, a nonprofit dedicated to mitigating vision loss, also says that early research suggests that blue light can contribute to eye strain.
What are blue light glasses?
Blue light blocking glasses have filters in their lenses that block or absorb blue light, and in some cases UV light, from 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.
Many blue light glasses you can buy also claim to help reduce eye strain. Most are meant to be worn during the day while working in front of a computer, and at night to prevent the blue light from screens from keeping us awake.
Should I get blue light glasses?
It depends. Do you want or need to look at your phone after dark, and then have trouble falling asleep?
There is ample evidence that blue light affects when our bodies create melatonin, so if you use screens long after sundown, these glasses might help stop you from staying up later than you want.
If you deal with digital eye strain, there is an easy exercise you should try before you invest in new glasses. Use the 20-20-20 rule: every 20 minutes, look at something at least 20 feet away for 20 seconds. The idea is that this helps break your focus from your screen, allowing your eye muscles to relax and stave off eye strain.
As for me, I’m writing this article wearing a pair of blue light glasses that I’ve used off and on for the last few months. While I’m not 100% certain that they are helping my eyes, I do notice my eyes feel less tired at the end of the day.
Could it be a placebo? Sure, but I’ll keep wearing them to find out.
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