Upgrading and properly adjusting your computer monitor can reduce the toll that spending hours a day looking at a screen can take on your eyes.  A 2016 study by The Vision Council found that 60 percent of people spend at least five hours in front of electronic displays, and two-thirds of these people experience some kind of vision problem, such as dry, irritated eyes or blurred vision. To better care for your eyes, consider replacing an older computer monitor with a larger, high-resolution LCD monitor that provides for more control over display brightness, contrast and color temperature.
Bigger Is Better
Choose the largest computer monitor you can afford and fit on your office desk or mount on your wall. A larger computer monitor means you're viewing larger text and images, so you don't have to squint to make out what's on the screen. With smaller computer monitors, if you want to display all of a page on your screen, you may have to reduce the size of the page and its contents. You don’t want to miss anything, and who wants to scroll horizontally to view what's on the right side of a Web page?
Monitor sizes are specified by the screen size measured diagonally in inches. Prices of 32-inch computer monitors and even larger have dropped substantially in recent years. If a large computer monitor won't fit well on your office desk, consider mounting it on a wall. Wall mounts are generally inexpensive and easily installed.
Go Easy on the Eyes With High Resolution and Low Flicker
Newer computer monitors typically provide higher resolutions than older displays. Higher resolution leads to finer detail and a sharper image, all of which help to reduce the strain on your eyes. Screen resolutions are stated in horizontal by vertical pixels per inch, or PPI. A screen resolution of 2560 x 1440 PPI consists of more pixels than a screen consisting of 1024 x 768 PPI. Your computer's video card or operating system may limit screen resolution, so that's something to consider if you are thinking about spending a lot for a very high-resolution LCD monitor.
All computer monitors produce eye-straining flicker, but some produce less than others. Flicker refers to how often the pixels on your monitor light up or refresh. This is called the refresh rate and it's measured in hertz, or cycles per second. LCD monitors produce less eye-straining flicker because they have higher refresh rates than older CRT monitors, typically in the range of 200 hertz. Don't worry if you see an LCD screen labeled with a 80-hertz frequency. That refers to the refresh rate coming from the video card, not what's displayed on the screen.
Adjust the Brightness, Improve the Contrast, Avoid the Blues
Your parents were on to something when they told you to leave a light on while you watched TV. For the sake of your eyes, it's best to adjust display brightness to match the brightness of the room. LCD computer monitors typically provide brightness controls as well as anti-reflective surfaces that reduces the glare that causes squinting, thereby reducing the urge to lower the lights. In addition, LCD monitor brightness is more evenly displayed at different angles, so you don't need to turn up the screen brightness to increase visibility at certain angles.
Display contrast and color can also affect eye health. The reduced glare provided by LCD and other types of flat-screen computer monitors allow improved contrast control. LCD and other newer monitors typically allow you to reduce your display's color temperature as well, which means less of the blue light that's associated with eye strain.
Of course, there's more to minimizing strain on your eyes than just choosing the right computer monitor. Take frequent breaks and look away from your computer monitor often. Adjust the height and distance of your computer monitor properly. Combined with choosing the right computer monitor, these steps can help reduce the strain on your eyes. Oh, and don't forget to blink.
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