Nah, it was just applying the effect and then tweaking the colors until they looked right, e.g. hint of eyeburn.

Oh, I thought you may have kept track of the R and G values and just separated them, as this is possible

Well... red and blue? There was nothing formulaic about it.

Got a question. How do you know what values to pick for chromatic aberration?

I think I may have gone too far with the doubling up on the aberration, hm. Thanks though <3

manual chromatic aberration is an interesting idea - think it works well here :)