How Monitor Refresh Rate Affects Eye Strain: 60Hz vs 120Hz vs 144Hz

Short answer: a higher refresh rate makes motion smoother, but it isn't a proven fix for eye strain. Going from 60Hz to 120Hz or 144Hz can make scrolling more comfortable to watch. The things that tire your eyes most are how long you focus without a break, how often you blink, glare and brightness, and whether the screen flickers.

What refresh rate actually changes

Refresh rate is how many times per second the screen draws a new image: 60, 120 or 144 times. Old CRT monitors flickered at their refresh rate, so a low rate really could be hard on the eyes. Modern LCD and OLED screens hold the image steady between refreshes, so a 60Hz panel doesn't flicker 60 times a second.

What a higher rate gives you is smoother motion. Scrolling text, moving the mouse and dragging windows look less smeared, so your eyes have an easier time following text while it moves. Many people find that more comfortable, especially if they scroll long pages all day. Research hasn't shown that it reduces eye strain on its own.

Flicker matters more than refresh rate

Many screens dim by switching the backlight on and off very quickly, a method called PWM (pulse-width modulation). At low brightness the flicker can get slow enough to bother sensitive people, causing headaches or tired eyes even though they can't see it. If that sounds like you:

• Look for monitors and phones sold as "flicker-free" or "DC dimming", and check reviews that measure PWM.
• Keep the brightness up a little and dim the room light less, instead of turning screen brightness all the way down.

What actually reduces eye strain

• Take breaks. The 20-20-20 rule: every 20 minutes, look at something about 20 feet away for 20 seconds.
• Blink. People blink much less while staring at a screen, which dries the eyes. A conscious blink, or eye drops if your eyes feel gritty, helps.
• Match the brightness to the room. A screen much brighter or darker than its surroundings is tiring. Cut glare from windows and overhead lights.
• Set the distance and size. Keep the screen about an arm's length away, slightly below eye level, and make text big enough to read without leaning in.
• Get your eyes checked. An uncorrected prescription, or glasses that aren't made for screen distance, is a common cause of strain.

So which should you buy?

If you game, scroll a lot or just like the smoothness, 120Hz or 144Hz is a real upgrade and worth it. If eye strain is your main worry, put flicker-free dimming, a good matte or anti-glare finish, and a comfortable size and resolution first, then take breaks. Warmer colors in the evening (Night Light on Windows, Night Shift on Mac, or a browser filter) can make late-night screen time more comfortable, though they won't fix strain from long focus sessions.