Thanks to health blogs, news articles, and scientific studies, the awareness over blue light and its effects continue to grow with every passing year. For most people, the mere mention of “blue light” or “visible blue light” raises statements such as:
“Blue light is bad that it can cause you to go blind”
“You should never use your tablet again because you can ruin your eyes”
“Blue light is poison for the eyes”
“With blue light exposure, you’ll never be able to sleep properly again”
Although most people know of it, blue light is not a stranger to being subject to misinterpretation. Unknown to most people, blue light actually has its benefits and dangers.
Facts about blue light
In this technology-driven and dependent period, it is vital to know everything about blue light, especially because we are exposed to it daily. Here are a few key points about blue light that everybody should know about:
Blue light fact #1: It is everywhere
One important fact about blue light that everybody should know is that sunlight is the primary source of blue light. Aside from sunlight, however, blue light is also prevalent in almost every human-made, indoor source of blue light such as (but not limited to):
- Fluorescent and LED lighting
- Flat-screen televisions
- Display screens of computers
- Electronic notebooks
When compared to sunlight, the strength of blue light (or High-Energy Visible light) from mobile devices and electronic screens is significantly less. However, the time that is spent on using them increases damage.
Blue light fact #2: Blue light is what makes the sky look blue
The blue sky that is a clear indication of a sunny day is, in fact, the result of short-wavelength blue light rays that scatter to create its unmistakable look. Compared to other types of light, blue light strikes air and water molecules in the atmosphere the hardest, which causes it to scatter more easily and resulting in a perfect, “sky blue” finish.
Blue light fact #3: The eye is not well-equipped for blocking blue light
A significant reason as to why the eyes are significantly affected by blue light is because they aren’t structured well enough to withstand the strength of high-energy visible light. The anterior structures (the cornea and lens) may be strong enough to block UV rays out, but are unable to block off blue light from reaching the retina and potentially damaging it. Once blue light penetrates the anterior structures and goes all the way to the retina, the risk of macular degeneration increases—a condition that can lead to permanent eye damage and vision loss.
Blue light fact #4: Not all blue light is bad for you
While it may seem like installing every blue light blocker, never looking at the blue sky again, and avoiding blue light as a whole might seem like a good idea, know that it’s a bad idea to block blue light all the time.
Researchers have discovered that ample, controlled amounts of blue light exposure are vital for good health, achieving benefits such as:
- Increased overall alertness
- Improved memory
- Enhanced cognitive function
- Elevated moods (such as treatment of “seasonal affective disorder” or “SAD”)
As fearmongering over blue light becomes more common due to poorly-researched health articles and self-proclaimed health experts, it is essential to know the truth about the concept. The four previously-mentioned blue light facts on this list are essential for staying on top of misinformation, so make sure to take all of them to mind!
If you are looking to learn more about blue light protection and filters, get in touch with us to see how we can help.