About: http://webisa.webdatacommons.org/395958503

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	The concave back surface of the lens will be provided with a spherical or other surface that is specifically designed to adapt the lens to the particular ophthalmic prescription of the wearer.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca