How to Test If My Glasses Block Blue Light

how to test if my glasses block blue light

There are a few different ways to determine whether your glasses block blue light. You can use Spectrophotometers to test if your glasses are effective at blocking the harmful light. There are also online tests you can perform to find out whether or not your glasses block blue light. Below, we’ll discuss each method. If you are unsure, check with a friend who wears blue-blocking glasses.

Testing if your glasses block blue light

You can find a blue light pen from several online retailers to test if your glasses block blue light. Purchase the blue light pen and filter the blue light from 395 to 450 mm. To test whether your glasses block blue light, place them over a white background and point the pen’s ray at it. If the pen’s beam of blue light is significantly reduced, your glasses block blue light. To test how effective your glasses are, they must block at least 30% of blue light.

You can test your glasses by comparing them to an RGB color wheel. Just search for this chart on Google and you’ll be able to find one. Once you find it, take out your blue light blocking glasses and look at the chart with and without them. You should notice a change in the color of the blue section. If the colors are similar, your glasses should block blue light. However, if they don’t block blue light, you should consider purchasing a different pair.

Another way to test whether your glasses block blue light is to look at the colors reflected by the lenses of your current pair. If you observe a purple reflection, this means that your glasses aren’t filtering blue light effectively. If the reflection is blue, this means that your glasses block at least some of this blue light. Blue light is a common ray from many digital devices and computers. As a result, it can affect your energy levels.


To test whether glasses block blue light, you need to know what spectra you are looking at. Spectrophotometers are devices that can measure the spectrum of light from 395 to 450 nm. You can find these instruments online from several retailers. To perform this test, you must place your glasses over a white background and point the pen at the blue light. If the blue light is significantly reduced, the glasses are effective in blocking blue light. To be able to do this test, your glasses must block at least 30% of blue light.

In order to measure the spectral transmittance, ten different lenses with different blue-control reflective coatings were compared. A control lens was also included for comparison purposes. For the measurement of the lenses’ spectral transmittance, we used a Cary Varian 5000 photo spectrophotometer. Light was entered through the front and back surfaces of each lens. The measuring procedure took about 10 minutes per lens. All lenses were Plano-power.

Using a spectrophotometer is the safest way to test if glasses block blue light. This device splits light into its component wavelengths in ten-nm increments. The result is a spectrum report that shows how much blue light the lens transmits or blocks. A laboratory-grade spectrophotometer costs thousands of dollars. However, if you are an eye care professional and want to avoid spending hundreds of dollars on such a machine, you can try a few simple tests yourself.

Online tests

A recent study showed that wearing blue light-blocking glasses increased the efficiency of working online. However, this effect was not statistically significant. That’s because it’s not clear whether glasses actually reduce the amount of blue light that affects the brain. This effect may depend on other factors, such as improved health. Regardless, the benefits of using blue light-blocking glasses outweigh any negative side effects.

When looking for glasses to block blue light, be sure to ask for a Transmittance Spectrum Report, which shows the percentage of blue light that the product blocks. This is a free service offered by the manufacturer of blue light-blocking eyewear, so it’s worth trying them on to make sure they work. Blue light blocking glasses can help protect your eyes and prevent eye strain and even interruptions of sleep. You can use an online blue light pen to determine if the glasses you are considering are actually blue-light blocking.

Another way to test if glasses block blue light is to hold a piece of paper or a white screen against a bright white background. The light from the object should reflect the color of the glasses – a purple reflection indicates that the glasses are not filtering blue light effectively. A blue reflection means that the glasses are at least partially blocking it. Typically, a pair of blue light-blocking glasses will block at least 30% of this light.