Many computer users spend long hours online every day and don't realize that looking at a bright laptop screen can be hard on the eyes. If you spend a lot of time in front of a laptop screen, consider reducing the brightness of the screen at the earliest opportunity. There's a quick and easy way to perform this task so you can save your eyes as well as your battery power.
Press and hold the "Fn" key on the laptop keyboard. This key is usually located at the top right or bottom left of the keyboard.
Press the "Up Arrow" and "Down Arrow" keys, which are usually located in the lower right of the keyboard, to increase or reduce the brightness of your laptop screen. Adjust the level so that you can gaze comfortably at the screen without any glare.
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Disconnect the battery charger from your laptop and repeat the above procedure. On some laptops, the screen brightness varies considerably, depending on whether or not the device is charged.