Blue Light Technology: How It Affects Human Eyes!

Blue light technology is one of the most important technologies that protect your eyes from harmful rays coming from the computer screen.

But what is this? and how does it work? Here is the complete article on that.

Blue light technology is nothing harmful but effectively helps reduce the damage to our eyes by the harmful rays from technological devices. 

These harmful rays are the blue light that comes from devices like mobile phones, laptops, PCs, etc. 

Blue light is seen everywhere and long exposure to this blue light can cause eyestrains, blurry visions, and headaches.

From a health point of view, long exposures to blue light can cause not just minor but also serious harmful effects on our health. 

Blue Light Technology: How It Affects Human Eyes!
Blue Light Technology: How It Affects Human Eyes!

You must have heard of blue-ray glasses. These blue-ray glasses work on blue light technology to block harmful rays reaching our eyes and hence, cause less eyestrain. 

You can also call them blue light filtering glasses because when you wear them while working with technological devices, they effectively reduce the damage being done to our eyes.

Just like sunscreen protects our skin from UV rays, blue light technology works on protecting our eyes from harmful blue light.

However, these days most monitors come with blue light filter technology, and if you were planning to purchase a new monitor then refer to our guide on best monitors for Nintendo switch and best monitors for digital artists here.

Effects Of Blue Lights

It is important that we know what effects blue light can have on us.

Blue light does not necessarily have all negative effects. Some amount of blue light is required by the human body to stay healthy as well.

But, excessive blue light at the wrong times can do the opposite effect, i.e. harm your body, especially your eyes.

How Blue Light Affects The Eyes
How Blue Light Affects The Eyes.

1. Keep Humans Awake

One of the positive effects of blue light is that it helps boosts the alertness level of an individual.

However, if you use a computer at the night, this positive feature becomes an issue because it will directly affect your sleep.

If you are exposed to blue light from the sun for a while, then it proves beneficial, as it also provides your body with Vitamin D and helps you fully awaken your body and mind.

In a way, it provides your mind with positive energy and helps you stay motivated throughout the day.

Apart from other colors, Blue light messes with human sleep. The blue light blocks a hormone called melatonin which makes the person sleep.

2. Harms Human Eyes

This is the most common harmful effect of blue light on human health.

Being exposed to close range of the blue light emitted from devices can seriously damage your eye’s retina.

You may not notice it, but when you stare at screens for a long time, you forget to blink and your eyes start experiencing fatigue because it starts absorbing the blue light.

This leads to mild headaches which turn into severe ones if the exposure time keeps increasing.

A variety of other problems like eye strain, blurry vision, and painful back start following along after increased use of LED screens.

Also, having the right color and contrast ratio on the monitor screen is very important. Wrong colors and contrast can cause eye fatigue and harm your eyes. Read our guide on Best Monitor Brightness And Contrast Settings For Eyes here.

Harmful rays protect from blue light filter lens.

3. Disturb Sleep Pattern

Blue light plays a major role in interrupting our sleep patterns. This happens because long exposure to blue light reduces the release of melatonin.

Melatonin is an essential hormone for sleep; if it’s not balanced, a lot of melatonin can make you too sleepy and less melatonin can make you stay awake. 

Hence, it is recommended that you get some sunlight in the morning because sunlight induces melatonin which helps us stay awake during the day thus, making the rest of the day productive. 

These were very few effects of blue light on us. Now, that we know the few common effects of blue light; let us learn how we can reduce the negative effects of blue light on our bodies.

How To Reduce Negative Effect of Blue Light On The Body

1. Use Blue Light Lenses

One very useful invention is that of the blue ray glasses. Blue-ray lenses use blue light technology to protect us.

Blue-ray lenses do not completely block the light coming from LED screens, but it helps significantly to reduce to effect of the blue light.

If you are someone who has to constantly be in front of the screen due to work, then it is important that you go through various eyewear brands, so that you can invest in the right blue ray lenses.

Always wear blue light lenses while playing games or while doing any professional work on your computer.

Use Blue light lens.
Use Blue Light Lens.

2. Protection From Sunlight

Since sunlight consists of blue light which to some extent can also harm our skin; we should apply the right amount of sunscreen.

Not all blue light from the sun is harmful as told before, it is very beneficial if you expose yourself to sunlight in the mornings.

Not only does it provide healthy nutrients to your body, but also helps you stay awake and productive throughout the day.


In conclusion, we can say that blue light is both harmful and beneficial. It all depends on the amount and the intensity of the blue light that our body is consuming.

Blue light technology has greatly helped us achieve good protection and enabled us to care for our eyes.

Hence, it is important that we purchase great blue-ray glasses to minimize the effect of blue light from LED screens.

We also learned about how sunlight plays a huge role in emitting blue light and how it also induces the hormone called melatonin.

Frequently Ask Questions (FAQs)

Ques: What is blue light and why is it harmful?

Ans: Blue light is a type of visible light with a short wavelength and high energy. It is emitted by electronic devices, such as smartphones, laptops, and LED lights.

While blue light is not inherently harmful, prolonged exposure to blue light at high levels can be damaging to the eyes and disrupt the body’s circadian rhythm.

Ques: What does blue light do to your brain?

Ans: Blue light can affect the brain in several ways. Exposure to blue light at night can suppress the production of melatonin, a hormone that regulates sleep.

This can make it more difficult to fall asleep and stay asleep. Blue light exposure can also affect mood and cognitive performance, with some studies suggesting that it may increase the risk of depression and impair cognitive function.

Ques: What are the pros and cons of blue light?

Ans: The pros and cons of blue light depending on the context and level of exposure. Some potential benefits of blue light include improving mood, alertness, and cognitive performance during the day.

Blue light therapy has also been used to treat certain medical conditions, such as seasonal affective disorder and sleep disorders.

However, prolonged exposure to blue light at high levels can be harmful, increasing the risk of eye damage and disrupting sleep patterns.

It is important to balance the potential benefits of blue light exposure with the risks, and take measures to limit exposure when necessary, such as using blue light filters or reducing screen time before bed.

Leave a Comment