  We report new precision measurements of the $^{20}$Ne--$^{22}$Ne isotope
shift for several transitions, as well as state-of-the-art, \textit{ab initio}
field-shift calculations. Our results are combined with historical measurements
in a global fit to obtain the isotope shifts of all fifty low-lying neon levels
with high precision. These level shifts show a wealth of electronic, nuclear,
and relativistic phenomena. Relying on the analogy between mass shift and
fine-structure operators, we explain this plethora of neon level-shifts
utilizing a small number of effective parameters in a global parametric
investigation. This investigation provides a birds-eye view on the isotope
shift phenomena in noble gasses. From this vantage point, we reinterpret every
effort made to calculate neon mass-shifts \textit{ab initio}, and show that a
remarkable agreement between experiment and theory is obtained.
