Assertion: astigmatism's cornea | /r/CapableOf | focus light
Facets:
value: on the retina
type: LOCATION
value: because of two simple properties
type: CAUSE
Source sentences:
text: The cornea focuses light because of two simple properties: it is transparent, and it is curved.
text: The cornea and lens of the eye are built to focus light on the retina, which is the light-sensitive tissue at the back of the eye.