Assertion: astigmatism | /r/HasProperty | a vision problem
Facets:
Source sentences:
text: Astigmatism is a vision problem that causes objects to appear distorted and blurry.
text: Astigmatism is a visual problem in which the cornea of the eye, the outer covering, is misshapen in an irregular way.
text: Astigmatism in children is a visual disorder in which observed objects are deformed, either from near or far.
text: Astigmatism is a vision problem caused when the clear front cover of the eye (the cornea) is shaped irregularly.