Skip to content

What’s Blue Light, and How Does It Affect Our Eyes?

  • by

You’re probably reading this post on devices that emit blue light. In light of the hours that people spend on screens hitting record levels Should you be worried over the light blue that is streaming directly into the eyes of your children?

This is blue light at a glance with a description of what it is and the ways it could harm — or improve your health.

The entire world is buzzing in electromagnetic energies. It moves around us, or even inside us in waves.

The length of the waves varies The longest is:

radio waves
Ultraviolet (UV) waves

The shortest range of electromagnetic spectrum that includes:

gamma rays

Most electromagnetic waves are invisble. However, a tiny portion of waves, called visible light, is discerned in the eye of the person who is it. The visible light waves vary in size between to 380 nanometers (violet light) to 700 nanometers (red light).

The wavelength of blue light

Longer the wavelength, lower energy it will transmit. Blue light has extremely small, high-energy waves.

They’re actually slightly larger and less effective in comparison to UV waves that are too short for humans to be able to perceive by the naked eye. Medical experts warn of the damaging consequences of UV radiations, which could cause damage to your skin and eyes.

Blue light waves that are high-energy are just as strong.

What is the cause of blue light?

Blue light, as with other visible light colors can be seen everywhere. The sun’s light emits blue. Also, incandescent and fluorescent light bulbs. Human beings are exposed greater amounts of blue-colored light before because of the wide-spread use of devices that depend upon light emitting diodes (LED) technology.

Laptop and computer screens, flat-screen televisions tablets, cell phones all make use of LED technology, which has significant levels of blue-colored light.

The eye is fitted with structures that guard it from certain kinds of light. The lens and cornea protect your retina’s light-sensitive part in the back of your eye from damage caused by UV rays, like.

Those structures don’t keep out blue light. They let in lots of itthe natural sunlight’s blue light much more than that from any single device.

Yet some doctors of eye have voiced concerns regarding exposure to blue light that comes from backlit digital screens and other devices. This is due to the fact that people are often using these devices in such a short proximity.

A study in 2020 that was released in the Indian Journal of Ophthalmology found that during COVID-19 lockdowns for instance, 32.4 percent of the participants used a blue-light emitting device for 9 to 11 hours a day. Additionally, 15.5 percent of the population used devices between 12 and 14 hours per dayan increase of a significant amount in the amount of time spent on screens, likely due to the changes in how people work during the outbreak.

The research so far isn’t proving the notion that blue light causes eye damage. Although some studies on animals have proven that blue light may cause damage to retina cells Eye doctors believe there is no evidence to suggest that blue light damage the retina of the eye of a human.

One exception recently doctors have reported that a patient who employed an LED face mask to improve her skin’s condition was unable to see properly and developed retinal lesions afterward. It’s not easy to know if the red or blue lights or even infrared light was responsible for the damage, since the face mask contained all three.

Researchers say that since LEDs are still relatively new, there aren’t long-term studies that can examine what blue light could cause to your eyes during your life.

Although current research suggests there is evidence that the light blue from computers and handheld devices might not pose a risk for your eyesight, there could be other dangers to be aware of.

Here’s a quick overview of the dangers and benefits that blue light waves can bring.

Macular degeneration, blue light and blue light

Macular degeneration caused by age (AMD) is the most reason for sight loss for people who are over 50 years older According to American Academy of Ophthalmology (AAO). It occurs when a structure located in your back eye region, called the macula, is damaged as you age.

In the end, you are unable to perceive the central part of your vision field. However, you may be able to discern things that are on the edges. However, objects and details within your vision lines could appear blurry and, over time, become more difficult to perceive.

Studies on animals and in labs have raised concerns regarding whether blue light might accelerate the progression of macular degeneration. Eye researchers and doctors do not believe there is a conclusive connection between the use of LED or blue-light emitting devices, and AMD.

Similar to that, a research review found no evidence that blue-light blocking lenses reduced the likelihood that a person who has undergone cataract surgery will later suffer from macular degeneration.

Digital eyestrain and blue light

Digital devices that are used close or for prolonged time periods could cause digital eye strain.

Studies have shown that when users utilize laptops, computers as well as other electronic devices, they are likely to blink less frequently than the average. A lower number of blinks can indicate less humidity.

Digital eyestrain can mean different things for different people, however it generally it’s connected to the focus system of the eyes.

When your eyes are tired due to staring at a blue-light emitting screen, you may observe:

dry eyes
eyes that are irritated or red
tired eyes
Face muscles tired from squinting

Blue light scatters much more easily than other visible light. This could make it difficult for your eyes to focus when you are exposed to blue light. In addition, your eyes may absorb blue light as unfocused visual static. The decrease in contrast could make it harder for your eyes to deal with blue light, potentially leading to straining your eyes.

There isn’t a lot of research that can prove that blue light is directly linked to eye strain. Studies of higher quality are required.

Sleep and blue light

While the jury isn’t out regarding the long-term effects from blue-light on eyes, there is more agreement on the effect blue light can have on the sleep-wake cycle.

Eyes with light sensors and even your skin detect the distinction between the bright blue light waves that are typical of bright daylight and the more pleasant red tones that indicate that the day is over. As the light around you fades to those shades of sunset the sensors in your eyes signal your body’s natural release of its bodies natural stores of melatonin. the sleep-inducing hormone.

A tiny study in 2015 revealed the fact that when exposed to light blue during the evening the body doesn’t produce the same amount of melatonin, and their sleep cycles get affected or interrupted.

According to a review from 2019 that blue light can disrupt your sleep patterns, additional problems may also occur:

increased risk of hormonal-related cancers, including prostate and breast cancer.
Lower levels of leptin an ingredient that signals hunger after eating
metabolic changes, particularly blood sugar levels

The exposure to blue light has many health benefits. It may:

help you stay alert
improve memory and enhance cognitive function
could help improve the severity of seasonal depression
aid in a few skin conditions.

Help you stay alert

A study from 2018 has proven the exposure of blue lights may increase your reaction speed and boost alertness when you’re not performing at your best performance during the day.

Improve memory and improve cognitive function

In a tiny 2017 study with 30 minutes of blue-light “washout” period did better in memory and verbal consolidation tests afterward. Participants in the study who experienced the amber-colored light “washout” did not perform as well.

It could help improve seasonal depression.

Blue light therapy is currently one of the most popular treatment options to treat seasonal depression. Researchers have discovered that it’s also a successful treatment for depression that’s not seasonal, and is particularly effective when coupled with antidepressant medication.

Improve your acne

A study from 2015 has proven the blue-light spectrum kills bacteria that cause acne and reduces inflammation associated with acne breakouts. Important note When you decide to test at-home blue light devices, ensure you pick one that has been that is approved through FDA. Food and Drug Administration (FDA).

Help clear some skin conditions

In a case study from 2017 and a review in 2018 in 2017, plaque and actinic keratosis Psoriasis were both improved through the treatment of blue light. A study from 2018 proved the benefits of blue light treatment. Blue light has proven beneficial in the treatment of basal cell cancer tumors.

The AAO suggests you follow the steps listed below to lessen the strain on your eyes from digital technology.

Do some practice with the 20/20/20 strategy.

When you’re using a gadget that emits blue light make a stop every 20 minutes and concentrate on objects within 20 feet of you. Examine those items for around 20 seconds prior to when you return to your closer view.

Keep your eyes moist

Eye drops, like artificial tears and room humidifiers are excellent methods to prevent your eyes from getting too dry and inflamed when you’re using blue-light emitting devices.

Make sure you have the correct eyeglasses for your prescription.

Looking at screens for extended durations isn’t recommended for eye health in general. If you’re wearing glasses prescribed by a doctor to correct your vision ensure that you’re wearing a prescription that’s intended to cover what distance you can see between the eyes and the screen, which should be about an arm’s length. Many glasses are designed to accommodate larger distances.

Change the blue light on your screen

To lessen the risk of sleep disturbance and eyestrain To reduce the risk of sleep disturbance and eyestrain, change your screen to the “night shift” setting that has warmer tones. You can also buy blue-light-filtering screens that you can put over your computer’s screen when working in the dark. The filter will cut off the glare off your screen.

In 2020, research suggests that they block between 30 and 60% of blue light, but it’s not clear if blocking blue light will aid in preserving the sleep-wake cycle of those who utilize backlit screens before going to bed.

Do not bother with blue-blocking specs

Numerous studies have demonstrated that blue-blocking glasses can be effective in reducing blue light however the AAO does not recommend glasses as a way to shield your eyes since there’s not enough evidence to prove that they reduce eye strain or improve the health of your eyes.

Blue light is a part of the electromagnetic spectrum. The majority of exposure to blue lights comes coming from the sun. However, certain health experts have raised concerns about the possibility that artificial blue light might cause harm to your eyes.

Certain studies have demonstrated that blue light damage to cells in lab animals. As of now, there’s not any evidence that that blue-colored light from electronic devices or LED screens can harm human eyes.

The long-term use of digital devices can lead to eyestrain from digital devices, however it’s a good suggestion to regularly take breaks when working or school requires many hours of screen-time.

Blue light may also disrupt your body’s sleep and wake cycles also, which is why it’s possible to stop using your device before bed and switch them to amber light mode.