Assertion: astigmatism | /r/CreatedBy | shaped lens
Facets:
value: irregularly
type: DEGREE
Source sentences:
text: Astigmatism may also be caused by an irregularly shaped lens, located behind the cornea.
text: Astigmatism may also be caused by an irregularly shaped lens, located behind the cornea inside the eye.
text: Astigmatism may, though less common, also be caused by an irregularly shaped lens or cataract.