Is Dark Mode Good for My Eyes?

You must have seen dark mode feature in Whatsapp and new Android devices and their UI's where you can activate dark mode and enjoy black background and screen without any problem. But you must be thinking that what is the benefit of using this dark mode? In this post I will try to explain it to you in a very short and to the point.

What is dark mode?

Dark mode (or dark theme) is a setting offered on many smartphone models. Dark mode displays an inverted color scheme — light-colored text and icons on a dark background. Most mobile devices are defaulted to light mode, in which dark text is superimposed on a white or light background. 

Dark mode is accessed through your phone's display settings and can be toggled on and off to accommodate user preferences. When applied, dark mode is displayed across the entire user interface, including apps.

Note: If you can’t find this option in your settings, it’s possible this feature has a different name, or that your phone (or its operating system) is outdated and doesn’t offer dark mode.

Believe it or not, dark mode actually existed as the “norm” before light mode. When personal computers were first available, monochrome monitors were the only option. 

The monitors used phosphorus which appeared dark on the computer screen. When a key on the keyboard was pressed, electrons would ignite the phosphorus into another color (often green) to create letters and symbols against the dark background.

What are the advantages of dark mode?

There are a lot of advantages to using dark mode, like extended battery life and reduced glare and blue light exposure.

MORE BATTERY, LESS CHARGING: Using dark mode can extend your battery life by up to 30%, which means you won't need to charge your phone as often. Note: If you find it's harder to read in dark mode, dimming the brightness on regular mode also will extend your battery life.

Exposure to blue light has been linked to symptoms of digital eye strain, including dry eyes, headaches and blurred vision. Not only that, but science has proven that blue light interrupts sleep cycles, meaning it can be difficult to get sufficient rest if you’re exposed to blue light near bedtime.

REDUCE BLUE LIGHT EXPOSURE: Switching your phone to dark mode can help reduce blue light exposure.

What is blue light? Exposure to blue light has been linked to symptoms of digital eye strain, including dry eyes, headaches and blurred vision. Not only that, but science has proven that blue light interrupts sleep cycles, meaning it can be difficult to get sufficient rest if you’re exposed to blue light near bedtime.

Many phones also have a blue light filter. The filter, which should also be located in display settings, lets you adjust the amount of blue light emitted from your screen. This is a great option for those who can’t see well in dark mode, but want protection from blue light.

AVOID SCREEN GLARE: If you’re viewing your screen in a dark room, the bright light from default display settings can cause an irritating glare. Using dark mode will cut the glare from your screen significantly for comfortable viewing.

You also can dim your screen manually in light mode or set your brightness to adjust automatically based on the surrounding lighting. Either option will effectively reduce glare if you prefer not to use dark mode.

Is dark mode better for your eyes?

While dark mode has a lot of benefits, it may not be better for your eyes. Using dark mode is helpful in that it’s easier on the eyes than a stark, bright white screen. However, using a dark screen requires our pupils to dilate more to take in information. 

Why is dilating bad? When the pupils dilate, the sharpness of your vision is lessened. When pupils constrict in heavy light exposure, vision sharpens. For this reason, it may be more difficult for some people to clearly see detail in dark mode.

People who have myopia or astigmatism also may experience halation (from the word “halo”). Halation occurs when light spreads past a certain boundary, creating a foggy or blurry appearance.

In other words, white letters can appear to bleed into a black background, making it more difficult to read, especially if the print is fine. 

Halation is more common and more severe when using dark mode, so those who already have vision issues may benefit more from a dimmed light mode or blue-light-filtering mode. No matter what mode you use to view your phone, the best way to ensure clear, comfortable viewing is to have an updated vision prescription. Correcting underlying vision problems will bring relief that dark mode can never achieve, both on screen and off.

And if you’re going to get new glasses, you can add special coatings in the process that will block glare and blue light.

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