What Can Blue Light Do To Your Eyes?

What Can Blue Light Do To Your Eyes
How harmful is blue light? – Blue light exposure from screens is small compared to the amount of exposure from the sun. However, there is concern about long-term effects of screen exposure from digital devices. This is especially true when it comes to too much screen time and screens too close to the eyes.

  • According to the Vision Council, 80% of American adults use digital devices more than two hours per day.
  • Nearly 67% use two or more devices at the same time.
  • Fifty-nine percent have symptoms of digital eye strain.
  • Since our eyes are not good at blocking blue light, nearly all visible blue light passes through the front of the eye (cornea and lens) and reaches the retina, the cells that convert light for the brain to process into images.

Constant exposure to blue light over time could damage retinal cells and cause vision problems such as age-related macular degeneration, It can also contribute to cataracts, eye cancer and growths on the clear covering over the white part of the eye.

According to a vision study by the National Eye Institute, children are more at risk than adults because their eyes absorb more blue light from digital devices. People also tend to blink less when using digital devices, which contributes to dry eye and eye strain. Other common signs of eye strain include headaches, blurred vision, and neck and shoulder pain.

According to the Vision Council, 27% to 35% of Americans reported experiencing one of these symptoms after using digital devices.

How long does blue light affect your eyes?

How Blue Light Can Affect Your Health Medically Reviewed by on September 16, 2022 Scrolling and swiping on social media. Watching TV. Reading work reports on your laptop. It’s safe to say most of us spend a lot of time staring at screens. And that can be bad for our eyes.


You may know them by the acronym ROY G BIV. Together, they make the white light you see when the sun – the main source of blue light – is shining. Fluorescent and LED (light-emitting diode) light bulbs also give off blue light. Each color in the visible light spectrum has a different wavelength and energy level.

Blue light has shorter wavelengths and higher energy than other colors. Some research shows a link between eye damage and short-wave blue light with wavelengths between 415 and 455 nanometers. Most of the light from the LEDs used in smartphones, TVs, and tablets has wavelengths between 400 and 490 nanometers.

In large amounts, high-energy light from the sun – like ultraviolet rays and blue light – can boost your risk of eye disease. That’s raised concerns about whether blue light from digital screens is harmful. More research is needed. Experts think digital eyestrain, or computer vision syndrome, affects about 50% of computer users.

Symptoms include dry, irritated eyes and blurred vision. Blue light may also damage your retinas. That’s called phototoxicity. The amount of damage depends on wavelength and exposure time. Animal studies show even short exposure (a few minutes to several hours) may be harmful. A filter that cuts 94% of blue light has been shown to lessen damage.

There’s evidence blue light could lead to permanent vision changes. Almost all blue light passes straight through to the back of your retina. Some research has shown blue light may increase the risk of macular degeneration, a disease of the retina. Research shows blue light exposure may lead to age-related macular degeneration, or AMD.

  1. One study found blue light triggered the release of toxic molecules in photoreceptor cells.
  2. This causes damage that may lead to AMD.
  3. Screen time, especially at night, is linked to poor sleep.
  4. The blue light from electronic devices messes with your circadian rhythm, or sleep cycle.
  5. It signals your brain to wake up when it should be winding down.

In one study, as little as 2 hours of exposure to blue light at night slowed or stopped release of the sleep hormone melatonin. Powering down your digital devices at least 3 hours before bedtime can help. Blue light exposure might raise your risk for certain cancers.

  1. One study found that people who work the night shift are at greater risk for breast, prostate, and colorectal cancers.
  2. Your child’s eyes don’t filter blue light as well as yours do.
  3. Too much of it from device screens may raise their chances of developing obesity, nearsightedness, and attention focusing issues.

At night, it may cause their body to release melatonin even more slowly than it does yours. To protect their eyes, limit your child’s screen time. And have them put all electronic devices, including handheld game devices, away at least a half hour before bedtime.

See also:  Why Do All Babies Have Blue Eyes?

Nighttime exposure to blue light was linked to depressive symptoms in animal studies. But exposure to blue light during the day may have the opposite effect. It’s been used to treat seasonal affective disorder, or SAD. That’s a form of depression related to the changing of the seasons. Research shows 20 minutes of blue light exposure in the morning helps ease SAD symptoms.

© 2020 WebMD, LLC. All rights reserved. : How Blue Light Can Affect Your Health

Is TV considered blue light?

Does TV emit blue light? – In short, yes. LED screens that are popular these days emit a great deal of blue light, which can be potentially harmful to the eyes. Therefore, watching too much TV, especially late at night, can suppress melatonin production that makes us ready for sleep.

Can phone light damage eyes?

Blue Light from Phone Screens – Blue light is shorter wavelength light. It isn’t new, and it doesn’t only come from phone screens. Even the sun emits blue light, You might be more familiar with UV rays and their damaging effects, Although blue light waves aren’t as powerful as UV waves, there are still many potential risks.

  • Prolonged exposure to blue light harms vision and eye health by damaging the retina,
  • The retina, located in the back of the eye, is crucial for converting light into signals.
  • Those signals are what our brain understands as vision.
  • Phone screens, and other digital devices, generate blue light differently than natural sources.

As a result, the blue light scatters more in the eye, creating more visual noise. The overstimulation leads to eye strain. Here’s how the scatter effect works: Imagine you’re watching a movie on a screen across the room. You can see the image and understand it.

Do LED lights hurt your eyes?

Chronic exposure to LED lights can speed up the ageing of retinal tissue, leading to a decline in visual acuity and an increased risk of eye diseases such as age-related macular degeneration (AMD).

Can I make my eyes blue again?

7 Ways to Get Blue Eyes – wikiHow

  1. Unfortunately, no. Just like your hair and skin color, the color of your iris is genetic. That means that unless you break down your genetic code or cell structure, your eye color cannot be changed permanently without surgery. The color of your eyes is determined by the amount of melanin that your irises contain: very little melanin gives blue eyes, while lots of melanin gives brown eyes.
    • Many babies have blue eyes when they’re born because their bodies haven’t created very much melanin yet.
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  1. Wear blue contact lenses. Contact lenses can give you the appearance of blue eyes without having to change anything physical. To make sure your contact lenses are safe, visit an eye doctor and get a prescription. If you have glasses, you can get prescription colored contact lenses to wear every day.
    • Colored contact lenses from home goods or costume stores aren’t safe, and they could damage your eyes. You should always purchase contacts from an eye care professional.
  1. Yes, you can use browns, oranges and blues to make your eyes look lighter. When you’re picking out eye shadow and eyeliner, go for softer tones like light brown and baby blue instead of black. It will help bring out the blue undertones in your eyes and make your eye color look both lighter and brighter. ‘
    • Other complementary eyeshadow colors that can enhance blue eyes include gold, warm orange-browns like peach and copper, red-browns like mauves and plum, and neutrals like taupe or camel.
    • You can also try wearing brown mascara instead of black mascara.

Yes, but it’s a very subtle change. When you feel an intense emotion like anger, sadness, or excitement, your pupils might dilate or contract. This change can influence how your eye color looks just slightly, but they might only turn a shade or two lighter or darker. Advertisement

  1. No, that’s an urban myth. Some people swear that by mixing honey and hot water and using it as eye drops, you can make your eyes turn blue. However, there is no scientific evidence to back that up, and you can really irritate your eyes that way.
    • Your iris is in the center of your eyeball, not the surface. Using eye drops won’t help change the color of your eye because you can’t actually touch your iris.
    • The same is true for lemon juice eye drops. You’ll just end up irritating your eyes.
  1. Yes, but there are many risks to eye color surgery. There are 2 surgical options for changing your eye color: a laser surgery and an iris implant. Both of them come with the risk of inflammation, cataracts, elevated pressure inside your eye, and blindness. In fact, the laser surgery isn’t even approved for use in the United States. If you’re thinking of getting surgery, talk to an eye care professional before you make any decisions.
    • Most eye care professionals will discourage you from getting surgery to change your eye color. It’s too dangerous and not worth the risks.
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It could indicate a disease or an illness. Changing eye colors might mean heterochromic iridocyclitis (inflammation of the eye), pigment loss, uveitis (inflammation of the middle eye), or trauma. Any one of these things can lead to blindness and health complications, so you should see a doctor right away if you notice anything strange.

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Categories: Medical Disclaimer The content of this article is not intended to be a substitute for professional medical advice, examination, diagnosis, or treatment. You should always contact your doctor or other qualified healthcare professional before starting, changing, or stopping any kind of health treatment.

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“This article was very informative and helped me avoid using the honey myth on my eyes.”

: 7 Ways to Get Blue Eyes – wikiHow

Do sunglasses block blue light?

Can Sunglasses Block Blue Light? – Almost all sunglasses protect your eyes by filtering out UV radiation, reducing glare, and blocking blue light when outdoors. However, not all sunglasses effectively reduce blue light from digital screens. The amount of Uv filtration depends on the lens tint.

Is computer blue light harmful?

The bottom line – Blue light from electronic devices is not going to increase the risk of macular degeneration or harm any other part of the eye. However, the use of these devices may disrupt sleep or disturb other aspects of your health or circadian rhythm.

Can blue light glasses damage your eyes if you wear them all day?

Conclusion – Wearing Blue Light glasses all day can help reduce eye strain from staring at screens, but no definitive studies are proving their effectiveness. There are also no known risks to wearing them, so if you find them helpful, there’s no harm in using them. Blue Light glasses can be a helpful tool for reducing eyestrain and fatigue, but they may not be necessary for everyone.

Do phones give off blue light?

How to turn off the blue light on my Android device – The majority of the Android devices feature a built-in blue light setting, one which you can enable by going to Settings and tap on Display. There you will find a setting named either Night Light or Blue Light, through which you can adjust the colouring temperature and schedule when you want to turn it on and off.

Can blue light harm your brain?

Discussion – Understanding the effects of blue light on various life processes is becoming an increasingly important health issue as humans are exposed to more blue-enriched LED illumination for most of the day, or even at night due to shift work and light pollution in large cities.6 However, long-term consequences of increased daily blue-light exposure across the human lifespan are not known.

In this study, we demonstrate that daily exposure to 12 h of visible light in the blue part of the spectrum accelerates aging in Drosophila, Light causes not only retinal damage but also neurodegeneration in the central nervous system, which may be involved in the premature decline in climbing ability and early mortality.

Our data also suggest that susceptibility to light increases with age and repetitive exposure to blue light induces the expression of stress-response genes. The detrimental effects of light on longevity have been reported recently in C. elegans ; 29 exposing these nematodes to white light or different parts of the light spectrum significantly reduced their lifespan, 29 suggesting a broad susceptibility to light in this species, albeit with stronger effects of shorter wavelengths.

  • Our data suggest that blue light is driving the aging phenotypes in flies since it dramatically reduced the lifespan, while light in the 500–700-nm range with similar photon flux only minimally affected longevity compared with D:D.
  • Numerous studies reported that light in the blue spectrum causes damage to retinal cells in vitro and in vivo in mammals and Drosophila,7, 9, 30 While these studies employed acute strong light, we show that photoreceptor cells of aging flies degenerate in response to 12 h of daily exposure to moderate blue light.

This degeneration was more pronounced in w flies than in age-matched CS flies, presumably due to a lack of the screening red pigment in the former genotype.21 Blue-light-induced degeneration of fly retinal photoreceptors appears to involve the phototransduction cascade, as retinal damage is mitigated by mutations that impair phototransduction.9 We show here that this may not be the case for organismal aging, because these mutations only partially rescue the lifespan reduction caused by blue light.

Likewise, addition of orange light, which is known to deactivate rhodopsin, did not rescue the lifespan. Thus, it appears that the effects of light on retinal versus organismal aging may be mediated by different mechanisms. A surprising outcome of our study is that blue light not only damaged the retina, but also caused neurodegeneration in the brain.

A significant age-specific increase in the area of vacuoles indicative of neuronal death was observed in brains of flies in B:D compared with age-matched flies in D:D. In addition, we demonstrate that blue-light-induced damage to the brain occurs whether or not the retina is present, suggesting that light can affect the brain directly and independently of the visual system degeneration.

  • To address possible blue-light-activated pathways in the brain, we tested the involvement of the photoreceptive proteins CRY and RH7, both of which are expressed in the brain, and determined that neither loss nor overexpression of either protein significantly affected fly survival in blue light.
  • Further studies will be required to dissect the input pathways mediating the effects of blue light on the brain.

We note that the effects of light on extra-retinal tissues may not be limited to invertebrates. There are reports that the exposure of rats or mice to constant light for several months was associated with a significant reduction in the number of dopaminergic neurons.31, 32 In addition, transcranial blue light may impact human brain activity.5 Taken together, these data suggested that the question of possible detrimental effects of light on brain aging deserves more attention.

We hypothesize that light-induced brain neurodegeneration may be the main cause of the decreased vertical mobility and reduced lifespan. However, at this time, we cannot exclude the possibility that other fly tissues could be affected by blue light and contribute to the accelerated aging. For example, the study on C.

elegans showed that mitochondria in the muscles were damaged by constant light exposure.29 Several studies determined that blue-light exposure results in the generation of reactive oxygen species (ROS) in the retina of mice 20 and flies 9 and even in skin cells.33 Light exposure that shortens the lifespan of C.

elegans also increases ROS levels and induced an unfolded protein response.29 The expression of selected stress-response genes was induced by light in worms 29 and in photoreceptor cells of the fly retina.34 Our data are consistent with these findings in that we detected increased expression of several stress-response genes in the heads of 35-day-old flies in B:D.

These included cnc gene, the fly homolog of the transcription factor Nrf2, which was also shown to be upregulated in response to blue light in murine retinal pigment epithelium cells.35 Importantly, expression of stress-response genes was not elevated in young flies in B:D compared with D:D, which is consistent with our data showing that mortality-inducing stress requires multiple cycles of blue light and is age-dependent.

In summary, our data suggest that blue light needs to be added to a range of environmental stressors that become increasingly harmful with repetitive exposure. Flies are used extensively to understand the mechanisms of aging in laboratories across the world, but the specifics of light conditions in terms of intensity and spectral composition are usually not provided.

Our study suggests that the light used in fly facilities may critically affect experimental outcomes and should be reported in aging studies to facilitate the consistency of the results coming from different labs. Our discovery that lifetime exposure to artificial light may cause extra-retinal damage and reduce longevity in a complex model organism provides a novel opportunity to understand the molecular mechanisms of the increasingly evident harmful side of light.

What does a blue light headache feel like?

Signs you may have a blue-light-induced headache blurry vision. tension in facial, neck, and shoulder muscles. increased sensitivity to light. headache.