Does Blue Light Equal Bad Eyes?
- Posted on: Jul 15 2017
Light is an interesting thing. We see white light not because it is directly white, but because a spectrum of hues comes together on the retina. These hues of red, orange, yellow, green, blue, indigo, and violet are energetic, each having its unique measurement. Outside of fascinating trivia, there is practical value in knowing a little more about the various wavelengths of light.
Over the past few decades, several advances have taken place to improve our use of electricity and to make life all-around better. A number of the new technologies that have become routine make use of blue light. You may have heard the term “blue light,” and may even know that it could be the source of digital eye strain, but there are more interesting tidbits to know about blue light, like where it is lurking in your life.
Most of us have grown up with lightbulbs, and many of us with televisions. The current generation of parents and children may not even be able to fathom what life could have been like without smartphones and gaming devices to keep them busy. The point is not whether or not these technologies are worthwhile; the point is that they expose us to wavelengths of blue light that could be detrimental to the eyes and more.
In addition to digital devices like our phones and our computer screens, including laptops and tablets, blue light is also the base of LED lightbulbs and compact fluorescent lightbulbs, both of which are popular due to their energy efficiency. Many televisions are now made with LED bulbs, which means every minute spent in front of that screen is a minute under blue light.
And this means . . .
The good news is that blue light is not likely to cause serious eye damage in adults. Children who are routinely exposed to these wavelengths of light, though, may have a higher risk of nearsightedness. Where both children and adults may feel the effects of unnatural blue light is in their quality of sleep. Blue light in sunlight provokes alertness, which is necessary during the daylight hours. However, at night, blue light has the same effect; it diminishes melatonin, which could cause endless hours of tossing and turning.
Do your eyes need a break? Limit screen time and stay up to date with eye exams. Friendly service is our priority at Roholt Vision Institute.