Assertion: multifocal contact lens | /r/HasProperty | designed for constant viewing
Facets:
value: through the center of the lens
type: MANNER
value: typically
type: DEGREE
Source sentences:
text: Multifocal contact lenses are typically designed for constant viewing through the center of the lens, but some designs do incorporate a shift in lens position to view through the reading power (similar to bifocal glasses).