How many people have felt that clear blue light blocking glasses have helped them sleep and protect their eyes?
There won't be many!
The reason is that clear glasses do not block blue light, but filter it!
Blocking vs Filtering
Blue light ranges in wavelength from approximately 400 nm to 500 nm .
According to the results of several credible studies, the most harmful blue light wavelength range has been found to be between 440 nm and 500 nm.
All clear blue light blocking glasses on the market do not block wavelengths above 420 nm.
Also important to note here is that there is a difference between filtering and blocking!
Filtering literally means filtering out a certain amount of light.
Transparent blue light cannot block the wavelength range of 420 nm or more,
It's all about filtering 30% to 60% of the light, not blocking the light below.
In other words, clear blue light glasses are filtering glasses, not blocking glasses!
Other companies use the word blue light solely as a means of marketing, but cannot actually prevent the harmful effects of blue light on the human body.
No clear blue light blocking glasses of any quality will ever block the full range of blue light.
So why do blue light blocking glasses have to be yellow/red?
What is Blue Light? As we learned in , all light forms a rainbow of colors.
The white light from most indoor lights is a combination of red, orange, yellow, green, and blue light.
When lice pass through glasses that block blue light,
The colors that pass through are red, orange, yellow, and green, and these colors combine to produce yellow .
That's why day lenses are yellow!
Also, if you block blue and green, the colors that pass through are red, orange, and yellow.
These colors combine to produce red .
That's why night lenses are red!
Most “blue light” glasses in Korea are completely transparent lenses with only a shiny blue reflective coating .
If the lens does not have a small amount of yellow or red color, it can be said that it does not block a significant portion of the harmful blue light emitted by LED and screen devices.
Eye protection glasses day lenses completely block the most harmful range of artificial blue light, 400nm to 460nm.
Sleep glasses night lenses suitable for wearing at night provide a noticeable improvement in the quality of sleep by completely blocking 100% of blue light and green light of 400 nm to 550 nm that adversely affect sleep.
With Lucid Eyes Day Lens & Night Lens
Experience the effect of true blue light blocking glasses!
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