About: http://webisa.webdatacommons.org/86460730

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	where P is optical power in diopters, Y is a coordinate whose axis is the vertical principal meridian of the lens and ??=3.14159+.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com