Just received and tested on an external website. Revain won't let me include the link, but you can find it under the terms "glasses blue light filter test" and the link I used in the title "how effective is your blue light filter". The test shows two different color spectra, and if you have normal color perception and your monitor can display RGB, then these two spectra should be very different BEFORE you put on your glasses. If the glasses are effective at filtering blue light, the two color spectrums should appear the same as soon as you put the glasses on. There was no effect with these glasses - the two spectra were different both before and after I put the glasses on (i.e. the blue light was still reaching my eyes). I also showed my husband who loves science more than I do the included blue flashlight and test card (which are included) and he said that the test spot on the card reacts to invisible UV light, not visible blue light, and that's all the glasses block. Maybe invisible UV light ALSO affects melatonin production, I don't know, but I do know that visible blue light *definitely* inhibits melatonin production and these glasses don't stop it from getting into your eyes. I was looking for something that could be filtered. blue light to support melatonin production in the evening and help me fall asleep easier/faster at night. These glasses did not meet the requirements. After further research I ordered 3 packs of the Uvex Skyper Blue Light Blocking Computer Glasses to be used in a lab to study the effects of blue light blocking.
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