Is Projector Light Harmful?

The advancement of technology has reached different areas of our life. We can enjoy it for both work and recreational purposes. Among the wide variety of devices created to make people’s lives easier, we can find projectors. 

One of the things that people love the most is watching movies, especially in a theater. However, it is important to bear in mind that not all of them have the financial resources and the time to go frequently to the movies.

Projectors have become a versatile tool thanks to the technological advances introduced in them. It is a device capable of receiving a video signal to project images thanks to a lens system. 

It should be noted that these devices are not only used for recreational purposes but also commercial ones. That is because they are tools that allow you to view different types of high-quality, high-resolution content on different screen sizes and anywhere, providing an excellent user experience.

Many use them to watch series, movies or play video games, while others prefer to use them for work environments, whether in commercial establishments, events, or presentations. 

We have to bear in mind that many users decide to buy projectors to be able to watch their movies and series on a larger screen. That is because a TV can be more expensive than a projector. The advantages of this device are its adaptability to different screen sizes, its price, and its easy installation anywhere. 

Despite all the above, improperly using a projector could cause damage to your eyes due to the light emitted by both the device and the screen. 

Is Projector Light Harmful? 

As we have just anticipated, projector lights can be harmful to our eyes. We have to clarify that this will only happen if we look directly at it. Also, if we are using a good projector and the right accessories, we will not have any problems. 

Most projectors have a light source of approximately 6 kilowatts which can be very harmful to the human eye. In extreme cases, it could cause serious eye damage and even blind the person. 

There is not so much risk to our eyes when looking directly at the image projected on the screen, but if we look at the light emitted by the projector bulb, it could be more dangerous. Similarly, it is advisable to rest our eyes every so often after watching a movie or series. 

When and Why Can Projector Light Be Harmful to Our Eyes? 

When You Look Directly into the Projector Lens 

We have already said that looking directly at the screen will not cause so much damage to our eyes as long as we take the appropriate preventive measures. However, looking directly into the lens of this device could cause eye problems. It is the same when looking directly at the sun for a long time. 

It is true that quickly placing and removing our eyes towards the lens will not cause serious damage, but we must avoid doing it constantly since it does not make any sense. This recommendation is aimed especially at children because of the curiosity that seeing such bright light can cause. 

The longer our eyes stay looking at the projector light, the more damage they will receive. 

When Infrared and Ultraviolet Light Hits us Directly 

The lens of a projector emits a large amount of infrared and ultraviolet light. It is true that this element does not produce as many ultraviolet rays as the sun, but it can still damage your eyes, especially if you look directly at it. 

The Projectors Emit Blue Light 

The first thing to know is that our eyes are always exposed to blue light. Some sources of emission of this type of light are the sun and the mobile devices we use every day. 

Blue light is a part of the spectrum of visible light (sunlight), which is made up of other colors such as red, orange, yellow, and green. Each of these different colored rays has a different wavelength.

When a light ray has a relatively long wavelength, its energy will generally be lower, so it will not be harmful to our eyes. However, when a light ray has a short wavelength, its energy will be higher and could cause eye problems. 

Ultraviolet rays have very short wavelengths. For example, blue light is close to ultraviolet light in the visible spectrum. Therefore, its wavelength is short, and its effects will be negative for the eyes. 

Understanding the above, we have to say that projectors emit blue light, which is powerful enough to damage our eyes if we look directly at it. It could directly affect our retina, causing us pain and other problems. 

Can Laser Projectors Hurt Our Eyes? 

Fortunately, these devices emit a less powerful light so your eyes will not be damaged when looking directly into the lens. Laser lights generally have a capacity of fewer than 5 milliwatts which is less dangerous for our eyes. 

However, it is not recommended that you look directly into the lens of these projectors because it could cause temporary eye damage. 

Precautions to Take into Account to Avoid Damage to Our Eyes 

Don’t Look Directly into the Projector Lens 

Under no circumstances should you stare at the light emitted by this device due to its great power. We have said that the projectors have 6 kilowatt light sources, which is a very high amount that could cause damage to our eyes. 

Don’t Let Your Kids See the Projector Lens 

Children are usually very curious, so they will not hesitate to stare at something that shines a lot, such as the projector light. They will just think that it is a nice light that will not harm you. You have to educate your children and explain that it is not good to look into the projector’s lens. 

Place the Projector in a Strategic Location 

One of the ways to avoid seeing the light emitted by this device is by placing it in a place where we cannot see it. For example, you can mount it on the ceiling or place it anywhere else out of sight of the people there.

The idea of ​​this is to prevent people from seeing the projector light either intentionally or accidentally. That way, their eyes won’t be exposed to eye problems. 

Use the Right Accessories 

This point is related to the previous one. You have to make sure to use high-quality mounts to prevent the device from moving or falling. 

Similarly, use a suitable screen that is large enough so that people’s eyes do not overexert themselves when looking at the movie or presentation. A large screen will avoid eye strain and pupil dilation. 

Modern Projectors with Features to Protect Your Eyes 

Due to the disadvantages that a projector has in terms of eye health, companies began to manufacture devices of this type with built-in smart safety features to protect the eyes. 

These functions were incorporated in order to avoid accidental eye injuries. Some projectors can automatically and temporarily turn off the lens when they detect a person or object too close. It is an excellent function, especially if you have children at home. 

Projectors of this type will allow you to enjoy your movies, series, or video games without having to worry about the damage that the emitted light can cause. In the same way, your business presentations will be more comfortable. 

Differences between Direct and Indirect Light and Their Effects on Eye Health 

Light sources are divided into two parts: 

  • Direct light. 
  • Indirect light. 

The first one refers to the light that falls directly on the object or space to be illuminated, while the second is the one that does so in a reflected and diffuse way. Most light sources (for example, televisions) are direct light emitters that can travel directly into our eyes. 

Logically, direct light sources are more severe and harmful to the eyes compared to indirect ones. It is the case of projectors where the emitted light is reflected on a surface. That is, it does not directly affect our eyes. 

Indirect light reduces and prevents eye fatigue and other eye problems. 


Projectors are incredible devices that allow us to watch movies, series, television programs, and presentations comfortably on any screen size. Although the light emitted by these devices can have harmful effects on our eyes, we can prevent any problems if we use them wisely and follow the necessary measures. 

We should never look directly into the lens of a projector as the 6 kilowatts of power they emit could cause serious eye problems. However, if you don’t feel confident with these devices, you can opt for laser projectors that have a light source of fewer than 5 milliwatts. With that power, our eyes will be less likely to suffer any damage.