What Is Blue Light and Why Is it Bad?
Have you heard of blue light before? You may have heard of it in reference to the sun, our main source or with electronic device screens. Perhaps that’s all you know. Did you know that although there are pros to blue light, there are a lot of serious cons too?
To help you understand it all a bit better, we will take a brief but detailed look at the blue light, discussing its pros and cons and how glasses from BlueVision could help you combat the determinantal effects.
What is Blue Light?
Visible sunlight is made up of violet, indigo, blue, green, yellow, orange and red light. It’s only when all these colours are combined that we see the actual white light we see and class as sunlight. Each individual coloured light has its own wavelength and energy rating. While red light rays have less energy and longer wavelengths, blue light rays have more energy and shorter wavelengths.
The interesting (and dangerous) thing you need to remember is that light that looks completely white can often have a larger blue component, meaning your eyes are exposed to a greater amount of the wavelength from the blue light side of the spectrum.
What Generates Blue Light?
As we have already noted, the sun is the biggest source of blue light we have, but there are others you should be aware of too, including:
- LED lights
- CFL or compact fluorescent light bulbs
- Fluorescent light
- Smartphone, tablet and computer screens
- Flatscreen LED televisions
Generally, the level of light exposure from these screens is smaller than that of the sun’s rays. However, there are concerns about the long-term effects of the kind of exposure to blue light you have from smaller screens because of the amount of time you may spend looking at them and their proximity to your face and eyes.
Cons of Blue Light
It’s worth noting that while there are some serious downsides to blue light, there are also positives. Let’s look at those first.
Cons of Blue Light
Now that we’ve looked at some of the positives associated with blue light, it’s time to discuss the serious implications it can have on the health of your eyes.
As visible blue light passes through your eye’s cornea and lens to reach the retina, this can cause problems with your vision and even age your eyes prematurely. Too much exposure can lead to:
- Digital Eyestrain – when blue light is emitted from digital devices and computer screens, along with how you sit, bad lighting, dry eyes and fatigue can cause digital eyestrain. Symptoms of this include focusing difficulties and irritated or sore eyes.
- Retinal Damage – There have been studies that have shown retinal damage can occur over prolonged and consistent exposure to too much blue light. Which can then lead to age-related macular degeneration.
How Can You Protect Your Eyes from Blue Light?
One of the best ways to protect against the harmful effects and downsides of blue light is by investing in BlueVision’s Blue Light Blocking Glasses. These are designed to protect your eyes from 65% of all blue light.