I don't see anything odd. There are no strange optical effects of any kind for me whether I stare in one spot, look around the image, zoom in/out rapidly using CTRL+scroll up/down.
Can anyone explain what scrolling has to do with the image or what strange effect is supposed to be happening please?
Edit: Oh, I guess that is the "joke". It's to troll and get someone to waste time trying to figure out why they see nothing strange and to try to figure out how to get it to 'work'.
Got me. And noted.
Seems my edit was not the case and it is that it requires viewing on a certain device in a certain way and performing a certain action to see the effect.
(post is archived)