The core problem in EnaG regarding everything related to perspective, vanishing point, horizon and so on, is that the author did not understood the problem of optical resolution.

For me it's more like, he did not understand perspective. Especially the issue, that parallel lines from real world, would not only intersect at the vanishing point, no, they terminate in the vanishing point. Infinity from real world is in the vanishing point.

As he could not understand the reason for, that infinite long lines (real world) would terminate (in projection) at the vanishing point, he mixed in "optical resolution", to solve his problem.

Mathematically spoken, the vanishing point is a singularity, the point of a function, where you cannot give a reasonable result. In this case it's: f=1/atan(a), there's no value for a=0;

An observer looking over a flat plane would have a line of sight - the line which hits the horizon/vanishing point, that is parallel to the surface. Now building the projection of a line on the surface (easiest, that line that goes through the feet of the observer), the projection lines will hit the surface at an distance given by f=1/atan(a) (hyperbolic), where 'a' is the angle between the line of sight of the observer and the projection line. 'a' corresponds with the distances on the projected line.

As 'a' gets smaller, you find that the nearer you get to the line of sight/horizon line, the larger the distances get, that are covered by a small change of 'a' (delta a). Which ends with a huge distance of real world surface squeezed into the last little section of the projected line near the vanishing point. (s. Att.)

So there's no reason to apply eye resolution to have a vanishing point. Also the issue, when the observer is placed higher, there's no need to move the vanishing point, it's already the projection of "infinity". The angles of the perspective lines are widened and thus the distances on the projected line.

The eye resolution issue, is an independent one, does not change the vanishing point.

You could explain part of this effect, where hulls of ships are vanishing due to eye resolution, with eye resolution alone...