So, you have taken the plunge to protect your eye health, sleep and hormones by investing in some blue light glasses. Great work, this is the first step to optimal light management.
But wait, you have read one of our previous blogs that not all blue light glasses are created equal and that many brand’s glasses are not actually doing what they should be doing. Hopefully you haven’t wasted your money but chances are if you are wanting to test your blue light glasses you have some concerns about whether they work or not. How to test blue light glasses is a question we are often asked at BLUblox.
Without a spectral analyser which costs upward of $10,000 it is hard to accurately test blue light glasses, but there are some ways to test your blue light blocking glasses at home. This way you can tell is you have the best blue light blocking glasses or the best computer glasses available reasonably well.
Let’s take a look at the at home testing methods you can use to test your blue light glasses.
Testing Your Computer Glasses
To find out if your blue light glasses are the best computer glasses available you first need to contact the company you bought them from and ask for a spectrum report. This spectrum report will show you how much blue light your computer glasses filter.
Computer glasses are characterised by a clear lens and are to be worn during the daytime only, after sunset they are useless but during the day they serve a great purpose; filtering down excessive blue light and protecting you from digital eyestrain.
When the company sends you their spectrum report you want to make sure your computer glasses filter down at least 30% of blue light across the entire blue range. LED lights of different sources have different levels of blue light so it’s safe to focus on a pair of computer glasses that filters down the whole spectrum by at least 30%. Do not take the company's word of it, ask for the spectrum report and you will easily be able to see how much, if any, blue light is being filtered. Also, avoid companies who focus their blue light glasses filtering on violet light, there isn’t much of this present in LEDs so do not waste your money.
A good test at home is to pop your computer glasses on and see what colour the light is that is reflecting off the lenses. If its blue light that’s reflecting off them then you know they are filtering some blue light. If the reflection is violet or purple you know that blue light probably isn’t being filtered effectively. This is a good basic at home method to test blue light glasses. This way you will know if blue light is being filtered and whether you have the best computer glasses.
One method that will not test your blue light glasses is the “blue light emitting pen” trick. This pen only emits violet light but your computer glasses need to filter blue light so ignore this marketing gimmick and run for the hills if the company tries to dazzle you with a violet light emitting pen on their computer glasses.
See below the joke that is the blue pen test, its very clearly emitting purple light not blue light. Do not use this test, it tells you nothing and serves your health no purpose.
How to test blue light glasses
The only way to know if you have the best blue light glasses for evening use, ones that have orange or red lenses, is to ask the company for a spectral report. If your red lens glasses are not blocking 100% of light between 400-550nm then return them or do not buy them. It is essential to block 100% in this range or you won’t have the best blue light glasses.
There is a method at home to test your blue light glasses. That is the test squares.
The squares below are black and blue without your blue light glasses on. Pop on your blue light blocking glasses (the ones you wear after sunset) and both squares should appear black. If they do not appear black then your blue light glasses are not blocking all blue light.
Another solid way to test your blue light glasses is to use the circle test. The B section should appear black and the G section should darken considerable. This shows that your blue light glasses are filtering some green light as well which is super important for use after sunset The less bright the green circle with your blue light glasses on the better.
These two tests are great but don’t give you 100% accurate answers, but they are a good initial test. The best and safest way is to ask for independent testing from the company with access to a lab grade spectrometer. That’s how you test blue light glasses effectively. Test example below on BLUblox Sleep+ using a lab grade spectrometer.
So, there you have it, how to test blue light glasses. Feel free to comment below the results from your own tests on your blue light glasses.