The analytical flux monitoring technique has been used to evaluate the caustic surface and line spread function (energy flux distribution along a line) on different image planes for point source light passing through a model of the human eye. It is shown by comparison with the standard spot diagrams that the caustic is a valuable tool in evaluating the aberra-tions and performance of the model of the human eye.
David L. Shealy,
William M. Rosenblum,
"Caustic and Analytical Illuminance Calculations for a Model of the Human Eye," Optical Engineering 14(3), 143237 (1 June 1975). https://doi.org/10.1117/12.7971874