Assertion: astigmatism's cornea | /r/CapableOf | sag over time
Facets:
value: a little
type: DEGREE
Source sentences:
text: There have been quite a few publications that have come out in the past 10 to 15 years looking at astigmatism over time, and finding that there’s a general drift from with-the-rule astigmatism to against-the-rule, presumably due to constant blinking and gravity causing the cornea to sag a little over time,” he says.