Pertaining to or exhibiting astigmatism.

In botany, without a stigma: applied to the flowers of gymnosperms from an ecological point of view. See Stigmaticæ.

adjective. Affected with, or pertaining to, astigmatism; ; also, remedying astigmatism.

adjective. suffering from astigmatism

adjective. of or relating to a defect in the eye or in a lens caused by a deviation from spherical curvature which prevents light rays from meeting at a common focus and so results in distorted images

"This discrepancy in focal length is a measure of the astigmatism, often referred to as the astigmatic difference, and will depend on the inclination angle of the light rays and the lens power (as opposed to the shape or refractive index)."

astigmatic difference  

achromatic  amoeboid  anticipative  color-blind  elucidative