distortion aberration

dis·tor·tion ab·er·ra·tion

the faulty formation of an image arising because the magnification of the peripheral part of an object is different from that of the central part when viewed through a lens.
See also: Petzval surface.

dis·tor·tion ab·er·ra·tion

(dis-tōr'shŭn ab-ĕr-ā'shŭn)
The faulty formation of an image arising because the magnification of the peripheral part of an object is different from that of the central part when viewed through a lens.