Various studies on the relative influences of things like pupil size,
age, etc., but not specifically your question. What is generally
accepted is that for young healthy eyes, the tolerances for most people
in most situations pretty much line up with the tolerances of the ANSI
standards for lens fabrication. Fortunately, the tolerances for
refraction pretty much line up with those as well.  YMMV.

Another aspect to this is cultural and socio economic -  like people
who cannot afford or access corrective lenses (poor countries eg) and
are forced to adapt.