So I was reading in the Wiki about the FE "perspective effect" - as shown in this diagram:

It's an interesting concept.
It says (in effect) that perspective isn't a "symmetrical" effect - it forces things downwards toward the horizon with increasing distance - right? I say not "symmetrical" because it evidently doesn't push things that are below the horizon upwards.
Then we're told that this is a defect of human vision - but that can't be the cause because cameras produce the same effects...so perhaps cameras have the same effect built into them so they take "natural" looking photos?
Trouble with that is that if I turn my camera upside down and take a photo - the same effect happens - the depression happens downwards.
For that to be the case, then this has to be caused by the Earth/Atmosphere - and not by the camera/eye.
So I think the Wiki could use some correction here.