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How to Select Laser Safety Glasses? The Easiest Way Tutorial

Writen by Joshua Clark

Fact checked by Daniel Rocha

how to select laser safety glasses

Choosing the best laser safety glasses might be difficult, and wearing the wrong glasses can exacerbate your difficulties as well as expose you to lethal eye dangers! The laser’s dangerous radiation can enter the eyes and destroy the cornea or retina, blinding you.

Therefore, it is critical to select the proper safety laser glasses to avoid hazardous laser beams from entering your eyes.

Read this article on “How to select laser safety glasses”. I will give you some factors to consider (the laser’s frequency, optical density, and transmission of visible light) and tips to select suitable glasses to protect from lasers. The information should help you decide what kind makes you most at ease.

Why Are Laser Safety Glasses Used?

Depending on the wavelength, exposure time, and output, a single abrupt exposure to a direct laser beam can cause irreparable eye impairment even at low power output levels.

Laser safety glasses with the ideal wavelength, optical density, and visible light transmittance can keep hazardous laser radiation out of your eyes and away from your retina. They reflect the hazardous rays, protecting your eyes from direct exposure to certain damaging lights. They even eliminate glare caused by intense light striking the eyes.

What You Need to Know


The Laser’s Frequency

The first and most critical factor is determining the frequency of the laser you’re utilizing. This information can be found in the laser’s user guide or on the serial plate. If you can’t find the laser’s frequency in either of these places, you may always contact your laser security guard. The frequency of the laser, also known as its wavelength, should be specified in nanometers. Knowing this will enable you to select the proper lens to protect your eyes from the wavelength of your laser.

OD (Optical Density)

After finding the laser’s frequency, you should determine the laser’s required optical density. This advice should be included in the instruction manual or technical guide. Optical density is a measurement of how much light is blocked by the lens of laser safety glasses at a specific wavelength.

The greater the optical density, the more light is blocked from the wavelength. For example, laser safety glasses with an optical density of 7 will block all but.00001 percent of the laser frequency.

Most medical facilities suggest laser safety glasses with an optical density of 5 or higher when dealing with medical instruments. It is completely fine to choose laser safety glasses with a greater optical density than what the laser owner’s handbook prescribes. This will give you increased security.

Transmission of Visible Light

A useful video for you about the visible light of laser safety glasses:

  • Laser safety glasses for visible light defend against laser beams in the visible spectrum, which are typically between 400 nm and 700 nm wavelengths of light.
  • Visible light laser safety glasses are never transparent; they would not protect against any visible beams if they were!
  • Laser safety glasses for visible light are essentially the opposite hue of the beam they are designed to guard against. This is intimately related to the concepts of what a “color” is: if it reflects or transmits a specific color, it will appear to be that color. If it absorbs a color, that color will not be seen through or reflected by the material.
  • Laser safety glasses that shield against blue light are often red.
  • Red laser safety glasses are often blue or green in color.
  • Laser safety glasses that shield against colors in the center of the visible spectrum, such as yellow beams, are often dark purple or brown in hue.
  • Visible light transmission (VLT) is typically proportional to the amount of protection you have in the visible spectrum. The darker the lenses, the more wavelengths you’re shielding against, and the greater the optical density (OD).

Quick Suggestions for Choosing the Right Laser Safety Glasses

  • First, you must determine the wavelength of your laser. Next, you must decide the required protection level, which is completely based on the output characteristics of your laser. You may also look for the lens’ optical density, which can be found in the laser handbook.
  • Choose the filter that best fits the above criteria.
  • Then, choose the one with the best visibility, commonly known as VLT.
  • The next step is to pick the ideal frame that complements your face shape and fits comfortably.

Other Factors to Consider

  • Always ensure that the eyewear is labeled with the essential specs that meet the norms of the nation you are visiting. In certain regions, it is required that glasses be labeled not only with wavelengths and optical densities, but also with L rating damage threshold standards. Many low-cost laser glasses in the market are not properly tagged or approved. Thus, they should be avoided.
  • Before utilizing your laser, always double-check that the laser glasses have the appropriate wavelengths and optical densities marked on them.
  • When utilizing and installing a dangerous laser system, a risk assessment should be performed and the necessary engineering controls implemented. One of the safety precautions is to use laser safety glasses.

Q&A About Safety Glasses


How to Select Prescription Laser Safety Glasses?

Many people may require more specialized laser safety glasses, which may include a prescription to allow you to continue reading or to address vision difficulties. Many manufacturers will supply laser safety glasses with prescription lenses, but in other circumstances, this may not be practical.

If you need a prescription for your laser glasses, seek for ones that are branded RX-able since they have been certified as frames that can be fitted with prescription lenses while still providing you with the necessary protection.

Also, check our list of the top-rated polarized safety glasses and welding safety glasses reviews if you need.

Is it really important to wear laser engraving eye protection?

Laser engraver safety glasses are critical. Any laser beam exposure, whether direct, dispersed, or reflected, can injure your eyes. If you shine the laser engraver’s light into your eyes, it will pass past the pupil and focus on the retina.

Even a fraction of a second of exposure to such strong light can harm your eyes’ retina, cornea, or lens. The real damage is determined by the eye’s focus setting, the precise location of the beam’s impact, the quantity of energy absorbed, the wavelength of the beam, the period of exposure, and the distance from the laser source.


While we always prioritize safety over style, we believe you should be able to find anything in our collection that meets your requirements.

The more familiar you are with the facts above, the easier it will be to select laser safety glasses. We hope that the information in this article is useful to you when deciding on the best pair for your laser.

Finally, if you are unsure about how to select laser safety glasses, read the laser safety glasses guide or consult with your laser safety manager.

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