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Mar 10, 2021 · When you stare at a screen for hours at a time, whether it is a computer, TV, phone or tablet, you are exposed to blue light from the device. Alarmist headlines claim blue light from too much screen time is blinding us. But there is no scientific evidence that blue light from digital devices causes damage to your eye.
- Computer Use
In real life or when using these technologies, our eyes...
- Glasses
There is some evidence that blue light affects the body’s...
- Alarmist Headlines
Blue light from electronic screens is not making you blind....
- 40 Minutes a Day Outside May Reduce Nearsightedness in Kids
A child’s vision gets stronger every year. The developing...
- Rahul N Khurana, MD
We would like to show you a description here but the site...
- Computer Use
Jul 5, 2022 · Blue light has a shorter wavelength with higher energy: 400–500 nanometers. Blue-light exposure can affect the retina — the layer of cells lining the back wall inside the eye that sense light and send signals to the brain so you can see.
Feb 12, 2024 · Blue light triggers your eyes to react, especially the lens, retina, and cornea. Some research shows a link between eye damage and short-wave blue light with wavelengths between 415 and...
- What Is Blue Light?
- Light and Sleep
- Is Nighttime Light Exposure Bad?
- Effects of Blue Light and Sleep
- Led Blue Light Exposure
- Protect Yourself from Blue Light at Night
Not all colors of light have the same effect. Blue wavelengths—which are beneficial during daylight hours because they boost attention, reaction times, and mood—seem to be the most disruptive at night. And the proliferation of electronics with screens, as well as energy-efficient lighting, is increasing our exposure to blue wavelengths, especially ...
Everyone has slightly different circadian rhythms, but the average length is 24 and one-quarter hours. The circadian rhythm of people who stay up late is slightly longer, while the rhythms of earlier birds fall short of 24 hours. Dr. Charles Czeisler of Harvard Medical School showed, in 1981, that daylight keeps a person's internal clock aligned wi...
Some studies suggest a link between exposure to light at night, such as working the night shift, to diabetes, heart disease, and obesity. That's not proof that nighttime light exposure causes these conditions; nor is it clear why it could be bad for us. Exposure to light suppresses the secretion of melatonin, a hormone that influences circadian rhy...
While light of any kind can suppress the secretion of melatonin, blue lightat night does so more powerfully. Harvard researchers and their colleagues conducted an experiment comparing the effects of 6.5 hours of exposure to blue light to exposure to green light of comparable brightness. The blue light suppressed melatonin for about twice as long as...
If blue light does have adverse health effects, then environmental concerns, and the quest for energy-efficient lighting, could be at odds with personal health. Those curlicue compact fluorescent lightbulbs and LED lights are much more energy-efficient than the old-fashioned incandescent lightbulbs we grew up with. But they also tend to produce mor...
Use dim red lights for night lights. Red light is less likely to shift circadian rhythm and suppress melatonin.Avoid looking at bright screens beginning two to three hours before bed.If you work a night shift or use a lot of electronic devices at night, consider wearing blue-blocking glasses or installing an app that filters the blue/green wavelength at night.Expose yourself to lots of bright light during the day, which will boost your ability to sleep at night, as well as your mood and alertness during daylight.- 4 Blackfan Circle, 4th Floor, Boston, 02115, MA
- hhp_info@health.harvard.edu
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Apr 25, 2016 · What is blue light? Part of the visible light spectrum, blue light is the high-energy light just beyond the potentially harmful ultraviolet light. Blue light is normally transmitted through the eye to the retina, because it is visible light that our eyes are designed to receive.
Apr 24, 2023 · Most exposure to blue light is from the sun, but some health experts have raised questions about whether artificial blue light could be damaging your eyes.
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What is blue light?
What is blue light & how does it affect your eyes?
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May 1, 2019 · The short answer to this common question is no. The amount of blue light from electronic devices, including smartphones, tablets, LCD TVs, and laptop computers, is not harmful to the retina or any other part of the eye.
