curvature aberration

cur·va·ture ab·er·ra·tion

lack of spatial correspondence that causes the image of a straight extended object to appear curved.

cur·va·ture ab·er·ra·tion

(kŭr'vă-chŭr ab-ĕr-ā'shŭn)
Lack of spatial correspondence causing the image of a straight extended object to appear curved.