I think the afterimage colors don't have to be all that detailed for this effect to work, since your brain is going to fill in a lot of detail once it's got the luminance information in the second image, and if you're staring at the dot, much of it is away from your fovea anyway.
I find that the effect is considerably muted if I look away and back again, but I can do it a couple of times before it goes away entirely.
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
Re: Whoa.
Date: 2006-06-16 12:58 pm (UTC)I find that the effect is considerably muted if I look away and back again, but I can do it a couple of times before it goes away entirely.