Assertion: lens's surface | /r/CapableOf | change in curvature
Facets:
value: gradually
type: MANNER
value: from the center of the lens
type: LOCATION
value: out to the edge
type: OTHER
Source sentences:
text: Aspheric lenses, on the other hand, have a more complex front surface that gradually changes in curvature from the center of the lens out to the edge.