Make your own Ebbinghaus image

Move every slider. The measured values update beside the image. Download the result as a PNG.

Measured from the image

Sliders

Things to try

Set the big flanker radius close to the small one. Watch the two discs look alike.
Move the flankers closer, then farther away. Note how the effect responds for you.
Change the number of flankers around each center and compare.

At the default settings this image measures 552 by 276 px. The sweep on the Ebbinghaus page tracks Radius of the big flanker discs (px) and marks these values as weak: 20 px.

Slider ranges

Setting	Min	Default	Max
Radius of both orange centre discs (px)	10	28	50
Radius of the big flanker discs (px)	20	46	80
Radius of the small flanker discs (px)	4	12	30
Gap between centre disc and its flankers (px)	2	8	40
Flankers around each centre	5	6	9

Your PNG carries a small bharamind.com credit strip under the image. Entertainment only. Not a vision or health test.