Categories Health Fitness and Nutrition

Blue Light and Phone Use

using phone at night

What is blue light, and how does it affect your vision and eye health? Well, we are all exposed to light in one way or another, and it ranges from ultraviolet to infrared. Most of the light you see that comes from the sun is very close to the blue end of the spectrum, causing the sun to be the biggest source of blue light. However, there are other sources as well, including LED lights, and screens (Cell-phones, TV’s, Tablets, etc). With technology getting more popular, how will all this extra blue light affect our eyes?

First, let me point out that blue light can be very beneficial to eye development and can boost alertness. In fact, studies have shown that the recent increase in nearsightedness could be caused by a lack of this blue light.

However, this is not all good, as blue light also keeps what is called your Circadian Rhythm (how your body determines if it is bedtime or not) in check. Looking at the light from your phone or computer too soon before bed can disrupt this rhythm, preventing you from being able to get quality sleep. It also can cause eyestrain, as well as potential damage to certain part of the eye if exposed for too long.

The best way to prevent these issues is to lower the amount of screen time you have daily, as well as taking the occasional break from your phone, tablet, TV, etc. Keeping the room well-lit during this helps as well, as it lowers your exposure to blue light. Also, turn off your device at least an hour before bed, as this helps your body adjust to the lack of light, thus making it easier for you to get some good quality sleep.

With just a few small things that you can do throughout the day and before bed, you can reduce your risk of eye-related issues related to blue light exposure.

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