Assertion: astigmatism | /r/HasProperty | an imperfection
Facets:
value: in the curvature of the cornea
type: LOCATION
value: in the shape of the eye
type: OTHER
value: in the lens
type: LOCATION
Source sentences:
text: Astigmatism is an imperfection in the curvature of the eye.
text: Astigmatism is an imperfection of the cornea preventing part of it from focusing light onto the retina.
text: Astigmatism is an imperfection in the curvature of the cornea (the transparent dome covering the iris and pupil of the eye), or in the lens (crystalline) structure of the eye.
text: Astigmatism is an imperfection in the curvature of the cornea.
text: Astigmatism occurs when there is an imperfection in the shape of the eye, either in the cornea or the lens.