About: http://webisa.webdatacommons.org/163560564

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	An optical element, such as a substrate or coating, may be integrated along one or both surfaces of the lens to provide the lens with smooth outer surface(s).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au