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If you spend a great deal of time in front of the computer screen or television screen, you are getting hit with a large amount of blue light. Blue light is not harmful, but many people find that it contributes to their eye fatigue or keeps them awake at night. Blue light glasses can help with this, but it’s hard to determine how much blue light they filter out. If you’d like to test your glasses, keep reading as we provide you with a step-by-step guide.
Blue light glasses look like ordinary reading glasses but have special lenses that help filter out the blue light emanating from your computer screen and television. They are designed to only filter out specific wavelengths of light so you can still see objects clearly while wearing them.
Staring at a screen for too long can lead to eye strain and frequent headaches, as well as dry eyes and blurry vision. These symptoms seem more pronounced in people who don’t try to filter out blue light, though research on this is still ongoing. Other theories suggest that the blue light mimics what we get from the Sun, and seeing too much of it at night can confuse our body and disrupt our internal rhythm.
The easiest way to test your blue light glasses for free is to find an object in your home that’s blue. Look at the object with and without the glasses; the bigger the difference, the better they work. If the object appears to be the same color with or without the glasses, they are not filtering blue light.
You can download a test image from the internet to help test your blue light glasses. The most basic test will have a blue square on the left and a black square on the right. When you put your glasses on, the darker the blue square is, the better they work. Seeing two black squares means the blue light glasses filter 100% of the blue light.
Almost all electronic devices, from your smartphone to your desktop, have a night light or blue light filter feature in the display settings that you can use to filter blue light. Many of these programs enable you to filter the blue light by a specific percentage. To test your glasses, you can set the software to filter out the blue light and look closely at the screen. Then, shut off the blue light filter, and put the glasses on. While wearing the glasses, the screen should look the same as it did when using the software filter. If it looks different, you can try changing the percentages of the software filter to learn how much light the glasses are filtering out.
Many blue light glasses, especially high-quality ones, will include a spectrum report that tells you exactly how much light the lens filters out. You want to find a pair that filters out at least 30%, but more is better.
No. If you don’t normally wear glasses, you can purchase a pair that only filter the blue light and does not magnify or improve vision. In many cases, these glasses are inexpensive.
Testing your blue light glasses to see if they’re working is not difficult and only requires looking at a blue object that you have around your home. If you don’t see a difference in the object’s color when you put on and remove the glasses, they are not working. Other tests can give you a better idea of how well they work, as many only remove a certain percentage of the blue light. Using your computer software can help you determine the exact amount, as can reading the spectrum report if one came with the glasses.
Featured Image Credit: Prostock studio, Shutterstock
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Ed Malaker is a veteran writer who contributes to a wide range of blogs covering information on computer programming, pets, birding, tools, fitness, guitars, and optics. Outside of writing, Ed is often found working in the garden or performing DIY projects in the house. Ed is also a musician, spending his time composing music for independent films or helping people repair their guitars.
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