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.
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.
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.
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.