Abstract

It is necessary to distinguish between monocular and binocular perception of lens distortion. Monocular distortion is seen as a local change in size inside the visual field or as a distortion of straight lines or right angles. In its binocular form, the different distortion in the two lenses (assuming binocular single vision) has a spatial effect which impairs stereopsis. A spectacle wearer with spherical minus power lenses will interpret a surface in space which is actually level as having a convex curvature.

© 1992 Optical Society of America