ref: July 19, 2004, "Akhenaten's distortion"
A distortion test:
Image 1: image with not distortion.
Image 2: 50 percent spherical distortion.
Image 3: 100 percent spherical distortion.
"Note that with increased spherical distortion the features become rounded
and there is no indication of the narrow, elongated features found in the
Akhenaten sculptures." George Johnson