HOW TO USE

1) Pick a speed (or preset) on PAGE 1

2) Press START for fullscreen

3) Follow the UFO with your eyes (don’t stare at one spot)

4) Exit with ESC or tap/click

WHAT TO LOOK FOR

Blur / smear: UFO becomes unreadable while tracking

Double edges: overdrive artifacts (ghosting)

Judder: uneven motion (often from frame pacing)

TIPS

TV settings: try motion smoothing on/off

Browser: zoom 100% for best results

Phones: disable low-power mode if stuttering

FAQ

Why UFO? fine stripes reveal blur/ghosting quickly.

Is this scientific? it’s a practical visual test.

Why px/s? it maps to perceived motion speed.

How do I exit? ESC or tap/click screen.

MINI BLOG (SHORT)

Motion blur is often dominated by “sample-and-hold” behaviour on modern displays.

Tracking a moving target exposes the limits of motion clarity instantly.

Compare multiple screens at the same speed for a fair test.

KEYWORDS (NATURAL)

motion blur test • motion clarity test • ufo test

ghosting test • overdrive artifacts • judder test

refresh rate perception • display motion quality