Have you ever had trouble falling asleep or gotten itchy eyes after a long day at the computer? As you probably know, all modern screens emit blue light, which can affect eye health and cause sleeping problems. But no need to panic! We have a few tips to help you protect your eyes and take better care of your vision. Read on to learn more about blue light and how to protect your eyesight. Or discover ViewSonic’s broad range of monitors designed with eye comfort in mind.
What is blue light? Have you noticed that your eyes get tired when you spend too much time in front of the computer? Sure you do, since you are the one who has to deal with the headaches, the super dry eyes, and even blurred vision at times.
What you may not be aware of though, is the impact it has on your vision, your sleep, and your health, as well as how you can immediately protect yourself by using a blue light filter. You’ve seen that when people use their electronic devices in a dark environment, they are covered in a blue glow.
That’s high energy visual (HEV) light ready to disrupt everyone’s sleep. While eye fatigue and sleep trouble may be the most commonly experienced problems, many other health issues are linking to blue light exposure. That’s why, below, we’ve endeavored to outline everything you need to know regarding blue light and blue light filters.
What Is Blue Light and Is It Really Bad?
Understanding Light and the Visible Spectrum
Consider light as electromagnetic radiation with an enormous range in terms of frequency, energy, and wavelengths – from gamma (as tiny as 1 trillionth of a meter) to sub radio (as big as the universe since there’s no theoretical upper limit).
Somewhere between the two extremes exists the very tiny fraction human eyes can detect, which is known as the visible spectrum, with wavelengths in the range of 400 nm to 700 nm. What else is measured in nanometers? Transistors! Back in 1994 and 1995, the smallest transistors were 600 nm and 350 nm, respectively. Today, chips are manufactured at 3 nm and approaching 2 nm nodes.
Why Blue Light Stands Out
Now, back to the visible spectrum and the colors of the rainbow: Red, Orange, Yellow, Green, Blue, and Violet. It’s crucial to notice blue light rays have the smallest wavelengths (380 nm to 500 nm) of all other colors in the visible spectrum because they have the highest energy photons.
Various technologies that light up the displays of the electronic devices use wavelengths in this range. However, the biggest source of blue light is the sun, which is known to be crucial in many ways. As such, it’s fair to ask, how bad can blue light truly be?
Blue Light, Biology, and Circadian Rhythm
On an evolutionary scale, not long ago humans lived outdoors and were ruled by the sunrise and sunset. That’s why a blue-light-sensing protein called melanopsin exists in human eyes. The bright daylight activates melanopsin, thus synchronizing the internal clock to raise alertness, boost reaction times, and mood. However, melanopsin is less sensitive to lower energy light in the visual spectrum, which allows for the production of a sleep-inducing hormone called melatonin as the sun goes down.
The problem at hand is that 90% of our time is now spent indoors under artificial light, thereby resulting in a deficit of direct sunlight during the day and overexposure to bright light in the evening. This combination has resulted in consequences to the natural circadian rhythm – or the master clock – of the human body. Unsettling the circadian rhythm paves the way to many of the prevalent diseases experienced in the 21st century, such as depression, anxiety, and obesity.
Potential Eye Health Risks
While ongoing research continues to explore possible links between blue light exposure and long-term eye health, current scientific reviews have not established a direct connection to macular degeneration. That said, limiting excessive exposure to high-energy visible light is still considered a sensible precaution, especially as the eye’s natural protective layers become less effective with age.
In one widely reported case, a Taiwanese woman developed a hole in her retina after years of using a smartphone outdoors and Dr. Hong, a doctor of Ophthalmology at Fooyin University in Kaohsiung, believes that the combination of the blue light emitted from the cellphone, and the ultraviolet light emitted by the sun led to this condition.
It seems as though blue light is both extremely beneficial and extremely dangerous. The best thing to do is to find ways to optimize the blue light intake during the day and regulate the exposure as the sun goes down. Thankfully, even NASA is invested in helping with this!
Why Do Computer Screens Emit so Much Blue Light?
Most computer screens today use a type of panel with layers of liquid crystals between pairs of filters and electrodes. These are known as LCDs, short for “Liquid Crystal Displays.” LCD panels require an external source of light to produce visible images. As such, LEDs are now the industry favorite for the task, after dethroning CCFLs due to size, efficiency, and cost.
The array of LEDs is often placed behind the panel or around the edges of the screen providing a bright light source. The most common type is referred to as white-light LEDs, and they combine the emission from a blue LED (around 450nm to 470 nm) with a yellow phosphor. This combination looks white when viewed directly and it’s the reason why so much blue light is being emitted from computer screens and other electronic devices.
To make matters worse, white-light LEDs are known to suffer from degradation over time, thereby causing an increase of blue emission. This degradation happens primarily through the bleaching of phosphors so that they no longer efficiently absorb blue light, thus leading to further eye strain.
5 Quick Steps You Can Take Right Now to Configure Your Workstation to Protect Your Eyes
1. Invest in a Computer Equipped with a Built-in Blue Light Filter
Nearly every ViewSonic model is equipped with a blue light filter capable of reducing the emission in the blue spectrum while maintaining the correct color balance.
2. Proper Lighting in the Room
Use dim, indirect lights and reduce possible glare, as well as reflections.
3. Adjust Display Brightness
Reduce display brightness and maintain the screen to be just slightly brighter than the ambient lighting.
4. Adjust Contrast
Use strong contrast for superior comfort and utilize the night mode when available (dark background with white font).
5. Adjust Color Temperature
Use a warmer color profile with more red and less blue.
What Is a Blue Light Filter for a PC and How Does It Work?
You are now fully aware of the different sources of blue light as well as the various health risks associated with it. If you want or need some computer time after sunset hours, it is a good idea to use some form of blue light filtering on your PC.
Most operating systems today include built-in blue light reduction features such as Night Light on Windows and Night Shift on macOS. These tools shift the display toward warmer tones in the evening and can help reduce overall exposure to high-energy wavelengths. Many users still prefer more customizable solutions, especially when comfort or color accuracy is important.
One effective alternative is using computer monitors with integrated blue light filters. These displays are designed to reduce short-wavelength emissions while maintaining accurate color performance. They also give users precise control over the level of protection.
With this technology, you can easily adjust how much blue light the screen emits using a scale from 0 to 100, where 0 represents the lowest level of blue light output. This allows you to tailor the experience to your comfort and viewing needs.
This technology, originally developed by NASA scientists for use aboard the International Space Station, was designed to support astronauts’ sleep cycles by adjusting light output throughout the day. Today, versions of this lighting approach are available to the public, using tuned LED spectra that mimic natural daylight during active hours and reduce short-wavelength blue and green light in pre-sleep mode.
Other Alternatives for Reducing Digital Eye Strain
Other valid alternatives, if your primary purpose is to reduce digital eye strain, include the use of third-party software such as f.lux or Iris, as well as blue light blocking eyewear. Please refer to a professional when choosing eyewear that filters or blocks blue light as these products may include magnification and specific optical centers.
Considerations When Choosing Blue Light Eyewear
Although proper eyewear seems to be most effective against the harmful effects of blue light, there are at least three aspects to consider. First of all, the price, which is heavily dependent on the quality of the lenses. Secondly, the fit, which needs to be tight or else blue light still reaches the eye. Lastly, most blue light blocking glasses are difficult to use when overlaid against regular prescription glasses. All in all, PC monitors with built-in blue light filters present the most convenient solution when compared to these options.
Adding to the convenience of a built-in blue light filter, wouldn’t it be great to use the monitor as a docking station? ViewSonic VG Series monitors feature USB Type-C connectivity, the best modern-era solution to transfer data, video, audio, and power through a single cable.
Follow the 20-20-20 Rule
Studies say blinking rates drop to one-third of normal when in front of a screen. For sure, that does not help with eye strain. With that in mind, consider the famous eye care rule called 20-20-20 according to which every 20 minutes you should focus for 20 seconds on any object 20 feet away from you. This simple exercise helps with headaches, blurred vision, double vision, and dry eyes.
Use the Pomodoro Technique
Another perfectly valid way to give your eyes some well-deserved rest while staying productive during long hours in front of a computer display is using the Pomodoro Technique. This technique breaks down the day in 25-minute sprints with small breaks in-between. These breaks help the brain to process new information, and since blue light will not be received during that time, it also helps prevent digital eye strain.
Although the use of any form of the blue light filter may be helpful, one sure way to reduce digital eye strain and improve the quality of sleep is to avoid using the computer, smartphone, tablet, or TV for 30 to 60 minutes before bed. Or equip yourself with ViewSonic’s monitors with low blue light technology here.
Frequently Asked Questions About Blue Light and Eye Strain
Does blue light actually harm my eyes? Blue light does not permanently damage the eyes, but excessive exposure can contribute to eye strain, headaches, and sleep disruption. The main issue is the intensity and timing of artificial light from screens, especially at night. ViewSonic monitors with low blue light and flicker-free technologies help reduce this strain while maintaining accurate color performance.
Why do my eyes feel tired after using a computer for several hours? Eye fatigue often occurs because we blink less when focusing on screens, which causes dryness and discomfort. Brightness, glare, and long periods without breaks also contribute to strain. Many ViewSonic displays include eye-care modes that automatically optimize brightness and reduce high-energy light to make extended work sessions more comfortable.
How can I reduce blue light exposure without sacrificing color quality? You can adjust display settings, use built-in blue light filters, or choose warmer color temperatures in the evening. Some solutions reduce blue light but also distort colors more than users prefer. ViewSonic monitors are designed to lower blue light emissions while preserving accurate RGB balance, making them suitable for both everyday use and color-critical tasks.
Are software solutions like Night Light or Night Shift enough on their own? These tools help by warming the color temperature of your screen, which can be useful at night and is better than no protection at all. However, they lack fine-tuned control and may not reduce the specific wavelengths that cause discomfort for some users. ViewSonic hardware-based blue light filters offer higher precision and more consistent results across different viewing scenarios.
What monitor features should I look for if I experience regular eye strain? Prioritize low blue light certification, flicker-free backlighting, adjustable brightness, and ergonomic positioning. These features help reduce dryness, fatigue, and glare during long workdays. ViewSonic monitors combine these eye-care technologies with modern conveniences such as USB-C connectivity and built-in presets tailored for reading, web browsing, and multimedia.
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