Assertion: astigmatism | /r/HasProperty | an image distortion
Facets:
Source sentences:
text: Astigmatism is an image distortion that results from an improperly shaped cornea.
text: Astigmatism is an image distortion that results from an improperly shaped cornea.
text: Astigmatism is an image distortion that results from an improperly shaped cornea.