The Facts Behind Blue Light And The Eyes


The topic of blue light and its strain on the human eyes has been exceedingly debated over the recent years. As more and more people are spending their days in front of the computer screen, experts are diving deeper into their research about the dangers of blue light. Today, we are going to take a look at some of the known facts about blue light and the human eyes.

Blue Light Is Not Just Man-Made 

It’s true that indoor sources of blue light are man-made. These include LED and fluorescent lighting. Most people view this man-made blue light from a computer, tablet, television, smartphone, or other digital devices.

However, blue light is naturally emitted by the sun outdoors. Anyone that goes outside will experience natural blue light. This light is much more powerful than that made for indoor viewing.

Digital Eye Strain Is A Side Effect Of Blue Light 

If your eyes hurt when looking at computer, it’s likely due to the short waves of the high-energy blue light. These waves scatter more easily than other visible lights, which make it much more difficult to focus. Scientists refer to this as ‘visual noise’. When there is a lot of blue light being emitted from a digital screen, it can overwhelm the eyes and can cause them to strain.

All Blue Light Is Not Bad 

Remember that you see blue light from the sun’s rays when you go outdoors. The blue light is not particularly bad for you in all instances. In fact, blue light is responsible for boosted cognitive, mood, alertness, and memory functions in the human body. Doctors are even using this type of light to treat seasonal affective disorders in depressed individuals.

Blue Light Should Be Avoided At Night 

Blue light at night can mess with an individual’s circadian rhythm. This rhythm is the body’s natural sleep and wakefulness cycle. During the daytime, blue light is imperative to keeping a person’s rhythm. At night time, however, too much blue light can suppress melatonin and keep the body from drifting off to sleep.

It’s very common these days for individuals to read before going to bed. The problem is they read on e-readers, kindles, and other electronic devices that emit blue light. We highly recommend using a blue light filter on these devices at night to ensure your sleep cycle is not unintentionally disrupted.

Computer Glasses Can Filter Blue Light 

If you spend long hours working on a computer, you may want to invest in a pair of computer glasses. These have the same effect as a blue light filter on the electronic device, except you can simply take off the glasses at any time without having to fool around with computer settings.

These glasses are typically tinted yellow and are available with your regular prescription glasses. We suggest talking to your eye doctor about getting a pair of computer glasses with your prescription already cut into the lenses to help reduce any eye strain caused by blue light.