Assertion: lens's surface | /r/CapableOf | bulge outward
Facets:
value: from the lens
type: MANNER
Source sentences:
text: Each surface can be convex (bulging outwards from the lens), concave (depressed into the lens), or planar (flat).
text: Each surface can be convex (bulging outwards from the lens), concave (depressed into the lens), or planar (flat).