Does Projector Have Blue Light? Find The Correct Answer Right Now!

Blue Light is one of those types that are harmful to eye health. So, devices containing this type are often not worth long-term use, including projectors.

Does the projector have blue light? It is probably the question many people have. In this article, I’ll help you find the answer and help you better understand its harmful effects. From there, take safety measures to protect your eyes.

Does Projector Have Blue Light?

Light on projectors

Unlike TVs, projectors emit blue light, but they won’t shine directly at you.

Although both projectors and TVs emit blue one, the light from the TV is more harmful. So we are often recommended to watch TV from a distance. 

Meanwhile, the projector produces indirect blue glint, so it will be more pleasing to the eyes when you watch it on the big screen. To ensure that your eyes are not affected much, you should choose a projector instead of a TV.

Note that the blue glint from the projector can still be safe. It only harms the eyes if you use the projector as a microscope or telescope. 

It’s best not to do this because if you’re not viewing it directly like your phone screen or HDTV screen, your chances of glint exposure are reduced.

The glint will bounce off the wall or screen before reaching your eyes. In other words, the projection screen acts as a filter, absorbing a significant portion of light. So the indirect glint from the projector is lighter in intensity and less harmful to your eyes.

Also recommended: How Does Projector Work? 

Blue Light Overview

What is blue light?
What is blue light?

Blue glint is a small part of the visible spectrum. Simply put, it is light that humans can easily see. Although glint has a short wavelength, it carries high energies that range from 380 to 500 nanometers. Please refer to the content below to better understand this type.


The first natural source is sunlight. However, people believe that all light visible to the naked eye is glint. As for electronic devices such as projectors, blue light is from artificial sources.


Nowadays, many electronic devices can emit glint. These include smartphones, computer monitors, televisions, and even compact fluorescent bulbs.


Although projector glint is less harmful to the eyes, we cannot deny its effects. 

First, this type disrupts the body’s natural melatonin production, and it stimulates the brain to send messages to keep you awake. 

If this situation lasts a few hours, it is not a cause for concern, but if you spend too much time in the day staring at the screen, it is different. Long exposure time will cause damage to the eyes.

The most obvious manifestation of this condition is lack of sleep. Most people affected by blue glint share this symptom. 

Prolonged illness will make you gain weight, increase your risk of death, and fall into a state of lack of alertness all day because of improper sleep.

Also recommended: Who Invented Projector?

How Does It Damage Eyes?

When exposed to a lot of glint for a long time, the eyes will have certain damage, even unable to recover to the original eye state.

There are many sources of blue light. It can come from a natural source such as the sun, and it can also come from devices such as televisions and projectors, if you are for a long time without using any additional protection tools.

Eye protection will inevitably lead to eye fatigue and dry eyes. Or, more seriously, it will lead to cataracts, promoting age-related macular degeneration.

There are two types of sensitive rods and cones in the human eye. Rod cells are capable of detecting blue, red, and green ones.

If the eye has these cells, you can only see black and white images. In other words, color blindness. The cones are responsible for color vision, and as we age, the number of cones decreases.

Ignoring the natural loss of these cells with age, high exposure to glint will make this process five times faster.

How To Keep Safety?

Here are some tips to help you keep your eyes safe from the effects of glint

  • Don’t look straight ahead
  • Use Protective Glasses
  • Correct Accessories

Don’t look straight ahead.

Do not look directly at the blue-emitting source that is the projector lens. And this is the best way to keep your eyes safe.

There is a heavy beam light at the projector lens that can be harmful to the eyes. 

So as long as you look directly into the lens, your eyes will suffer a lot. No, but other parts of the body are also severely affected. 

So it’s best not to look directly at the projector lens or laser projector.

Use Protective Glasses

Use Protective Glasses

Another optimal solution you should apply is to use additional protective glasses. 

This type of glasses helps limit the impact of glint from the projector directly on the face and eyes. So I recommend you use it whenever standing in front of projectors and other types of electronic screens.

Correct Accessories

To ensure the safety of your eyes when exposed to blue light, you need to bring accessories when necessary. 

Therefore, you should invest in a suitable mount and a good screen to keep accessories neat. 

To optimize the effect of eye protection, it is best to keep a controlled distance for vision and ensure that you are not directly exposed to a harmful blue one.


Above is what I want to share with you about the light emitted by the projector. 

Although less harmful than the blue coming from the phone screen, or TV, we cannot eliminate its effect on the eyes. 

Hopefully, with this information, you will have better eye protection measures.

If you have any related experience that you want to share, don’t hesitate to leave a comment below so that many people have more useful knowledge.

Don’t forget to share this article with your loved ones or friends.

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