Blue cut lenses are everywhere in India and you will be shocked to know that roughly 90% of them DO NOT block significant amount of blue light. Perhaps you have also been suggested to wear non-colored blue cut lenses due to your heavy usage of digital screens. That is why you are on this page. Right? This is true that screens emit harsh blue light and studies have alarmed about the ill effects of the same but using a right product is equally important. In this article, we have tried to unveil an inside dark tactic which is used very commonly by opticians & optical retail shop owners all over the world to sell the optical products that do not provide much protection against blue light. Some may get angry after reading this but truth should prevail.
This is what retail stores owners & opticians do to trick you
So you visit an optical retail shop or optician and tell him about your requirement. The shop owner welcomes you and asks his junior assistant to bring two different lens types. He places them on the table. One of them is a simple anti glare lens and other is blue cut lens.
And the”MAGIC” begins.
He pulls out a laser pen from the desk and points the laser one by one on each lens type. Now the normal lens does not block the blue laser however the one that you are willing to buy and he is willing to sell does block the blue light.
You are now sure that he is selling you blue cut lenses and decide to purchase it.
What is the reality of that blue laser magic ?
Secret of that Magic is that the blue laser pen he used was actually a UV (violet light) laser and not an appropriate blue light torch. Photo chromatic lenses do not turn dark due to blue light but because of UV light. Those lenses might not be much useful for a person who want protection against blue light. Moreover modern screens emit blue light and not UV rays. Irrespective of the lens brand, it is a fact that non-colored lenses can not block the blue light as much as the amber lenses do. You may call them blue cut lenses but they hardly block 10 to 20% blue light only.
Some sellers also sell their products by showing the same trick on their websites through video.
So are those non-colored blue light blocking lenses fake ?
Who should buy those non-colored blue cut lenses ?
Anyone who does not spend much time in front of digital screens and executes color sensitive work on laptop/ mobile. For example, a photo editing professional or graphic designer should go for non colored blue cut lenses only as their work is related to colors. Moreover they do block some amount of blue light also.
Alright, so which lens type blocks a good amount of blue light ?
The only lens type which is scientifically proven to block a significant amount of blue light is amber lens. National Center for Biotechnology Information (NCBI) has published a scientific report on its official website that says Amber lenses block blue light and improve sleep.
Amber lenses are usually made up of fiber material and are colored.
Key take away:
- If you are a laptop & mobile user who works in front of digital screens for long hours then always prefer to wear Amber lens type. They are colored and usually appear yellow or orange.
- Clear lens type or non-colored blue cut lenses block very less amount of blue light which can hardly be 20% only. Some companies claim 100% blocking which is very difficult to believe if the lenses are non colored. Moreover blue light is not entirely bad. Hence it is safe to let some amount of blue light pass through the lenses for mental alertness.
- UV laser should not be used to check the authenticity of blue cut lenses. Use a simple LED torch that emits blue light. Blue color objects appear slightly greenish through genuine anti blue ray lenses.
- In India, Zebriana brand provides eyeglasses with amber lenses that can be used to block the harsh blue light.