Should you be concerned about blue light? We’re sure you’ve seen the term “blue light” before, whether that be on social media, or articles warning of the harm it may cause to your eyes. But does exposure to blue light actually cause harm to our eyes? Read on to learn if blue light is a real cause for concern.
What Is Blue Light?
Blue light is a type of wavelength contained in a ray of light. You can find blue light in sunlight, fluorescent light, TVs, computers, tablets and smartphone screens all emit blue light. The longer the wavelength, the less energy that form of light has. But the shorter the wavelength, the more energy, and the more it can affect our bodies. This is where people become concerned about the blue light.
Blue light has a shorter wavelength, much like harmful ultraviolet rays. UV rays are what burn our skin when we go out into the sun without any sunscreen on. Researchers are now wondering if blue light can have a similar, long-term effect on our bodies as well.
What Effects Does Blue Light Have On Our Bodies?
There has been no conclusive evidence that blue light causes physical harm to our eyes over a long period of time. On the other hand, blue light has also not been studied for that long. So it wouldn’t be crazy to take preventative measures to ensure the health of your eyes.
What we do know is that blue light affects our sleep-wake cycle, also known as our circadian rhythm. Blue light is what wakes us up in the morning via sunlight, and what keeps us going during the day. It keeps us awake by suppressing our melatonin (the hormone our bodies release when it’s time to sleep).
The problems with blue light arise when we continually expose ourselves to it after the sun sets (when we should be sleeping!) If you watch a lot of television before bed, or surf the web on your cell phone or tablet, you’ll probably find that you’re having trouble falling asleep.
How Can I Take Preventative Measures Against Blue Light?
It is recommended that you reduce your screen time before bed, or switch your screen lighting to more yellow tones. Some researchers suggest you even stop looking at any type of screens three hours before sleep.
Some people often experience eye strain, especially those who work on a computer all day. For this, it is important you take frequent breaks from the screen if possible. You can also purchase yellow filters for your screens if you cannot avoid looking at a screen.
Here at Orangeville Optometric Centre, we provide professional and comprehensive eye care for your entire family. Contact us today if you’ve got any questions regarding blue light and how it can affect your health. Our Orangeville optometrist can conduct eye tests or eye exams if you think you’re experiencing problems with your vision. Call us or book an appointment here https://orangeville.visualbook.ca/.
