Assertion: astigmatism | /r/CapableOf | take place
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Astigmatism takes place when the surface of the cornea or the inner curve of the eye lens is shaped irregularly or changes over time.
text: Astigmatism takes place when your cornea or lens is curved more steeply in one direction than in another.
text: Astigmatism also takes place due to a reasonably unusual condition called keratoconus in which the cornea ends up being progressively thinner and cone-shaped.
text: Q: At what age does astigmatism usually take place?