About: http://webisa.webdatacommons.org/369426948

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	A lenslet according to FIG. 17a or 17b with a viewing power of e.g. 0 D and a reading add of e.g. 2.5 D--when measured in air--can be incorporated in a usual lens button.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com