OLED or LCD for your eyes: flicker, brightness and what the evidence shows

People ask me which panel is easier on the eyes. The short answer is that I can't find a study proving OLED or LCD harms anyone. What exists is a flicker measurement, and flicker is something you can check per model.

Where the worry comes from

Screens dim by switching light on and off very fast, called PWM. Slower switching is easier to see. DXOMARK's flicker article puts OLED PWM at about 50 to 500 Hz and LCD at around 1,000 Hz or higher. It says flicker sensitivity reaches up to about 250 Hz for most people, and that a high PWM frequency above 1,500 Hz "tends to be safer for users."

So the argument is straightforward. OLED phones often sit in the range some people notice, and LCDs sit above it.

The numbers on real phones

DXOMARK's flickermeter table shows the spread:

• Samsung Galaxy S20 Ultra (OLED): 241 Hz
• OnePlus 8 Pro (OLED): 481 Hz
• Samsung Galaxy Note20 Ultra (OLED): 240 Hz
• Xiaomi Mi 10T Pro (LCD): 2,360 Hz

The page was published in February 2021, and those are phones from around 2020. Treat them as an example of the gap, not as a statement about 2026 hardware. I haven't confirmed a figure for any current model here.

One detail I like: the Note20 Ultra had a fast screen refresh and still a low PWM frequency. A 120 Hz screen doesn't mean fast flicker.

What OLED-Info adds

OLED-Info explained back in January 2018 that PWM "may cause eye strain and headaches" and that some people are far more sensitive than others. It's a plain statement of risk, with no trial behind it. A reader comment on the page cites 10% of people being affected, but that's a comment, not data, and I won't repeat it as a fact.

Brightness changes the picture

DXOMARK notes that at minimum brightness in a dark room the diode is off for most of each cycle, and at lower PWM frequencies flicker becomes much more noticeable. That's the awkward part for low-frequency PWM panels. If you read in bed at minimum brightness, that's where I'd look first.

LCDs have their own problems. A cheap LCD with a low-frequency backlight can flicker too, so the panel type alone doesn't settle it.

How I'd choose

1. Look for a flicker test on the exact model. Notebookcheck's reviews report PWM frequency, and RTINGS runs a PWM flicker test on TVs.
2. Check whether the phone or laptop offers a high-frequency or DC-like dimming mode.
3. If you get headaches from screens, try the device in a shop under your usual brightness before buying.

I'd go OLED for contrast and still check the number. I'd go LCD if I knew I was flicker-sensitive and the model had no honest measurement.

For laptops, look through the laptop catalog and filter on the panel type in each spec page. Refresh rate is a separate thing, covered in what refresh rate means. And if you're shopping on a deadline, the Black Friday 2026 guide covers timing. Storage is a separate decision again; see how much storage you need. Prices elsewhere were checked November 1, 2026.