The background, theory and application of aberration fields in nonsymmetric systems is discussed. The usefulness of this concept, in the context of a new aberration display, is highlighted with an example.
John W. Figoski,
"Aberration Characteristics Of Nonsymmetric Systems", Proc. SPIE 0554, 1985 International Lens Design Conference, (14 February 1986); doi: 10.1117/12.949203; https://doi.org/10.1117/12.949203