To test the filter of anti-blue light glasses, it is good to remember what this blue light is. Light is a wave, and depending on the frequency of this wave, the human eye perceives this light in different colors. Light is perceived as blue when its frequency is between ~ 390 and ~ 500nm in the electromagnetic spectrum.
Contrary to popular belief, blue lights are not harmful. Only the lowest frequencies, from 390nm to 450nm, are detrimental to the eyes. These are close to UV (Ultraviolet) and are harmful to the eyes and the skin. Apply sunscreen to your skin and wear sunglasses.
It’s the same for blue light; to protect yourself, you must wear glasses that block the lower frequencies of blue light. These glasses have lenses with a protective layer that filters out harmful frequencies in the light spectrum. This filter prevents bad blue light from entering your eyes.
Let’s look at some compelling methods to check if there’s any reality.
If you need to check your computer glasses, the most prominent and precise way is to contact the company from which you bought the pair. It’s highly advised not to consider their verbal guarantee instead of asking for a spectrum report. The report will chop down everything for you, and you will know exactly how much blue light your glasses filter.
Upon receiving the spectrum report, inspect it thoroughly, and if your glasses are filtering at least 30% blue light, then it is worth your money; For comparison, muunel lenses have 100% filtration up to 420nm, 80% filtration at 430nm, and 50% protection between 430nm – 460nm spectrum.
Keep in mind that the company Complies with European standards for ready-to-wear shows.
This will help to give “confirmation” that the lenses are of good quality.
If you don’t care about precision and want a general method to check if your glasses block any blue light, then we have some ways for you. For starters, you need to take off your glasses and place them in front of transparent light; if the lenses reflect a bluish color, then it can be concluded that they’re blocking some ratio of blue light; however, if the color happens to be violet or purple, then it’s merely a no-no.
If you see both the squares in the picture as black (while you’re wearing the blue light glasses), congratulations, your blue light-blocking glasses work great. However, this method is not precise and can’t be relied upon against its report. If you can get a spectrum report from your company, that’s still the best way.
You will find many ways to check if your glasses block enough blue light or not online, but all of them are limited towards precision; if you want to be sure and don’t want to go wrong in your investment, then I would suggest relying on the company’s report should be your only way to go.
We take care to flood this information on the product page and the catalog that the customer receives at purchase.
No matter how much blue light your computer glasses can filter, it is still advised to take a different approach while using tech gadgets; taking a break now and then doesn’t hurt; also, if you have to sit in front of a screen for long hours, try looking away from it after every 20 to 25 minutes, try focusing your eyes on something that’s at least 20 meters away from you for at least 20 seconds or more.
Your priority should always be protecting your eyes, and a pair of glasses cannot ensure you anything if you don’t take precautionary measures and don’t care about your vision.