Assertion: astigmatism's cornea | /r/CapableOf | refract light beams
Facets:
value: in equal measure in all meridians
type: OTHER
Source sentences:
text: The condition occurs because of an improperly curved cornea which doesn’t refract the light beams in equal measure in all meridians (this is known as corneal astigmatism); the light rays aren’t focused correctly on the eye’s retina.