About: http://webisa.webdatacommons.org/292729681

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	FIG. 17 is an embodiment of an ophthalmic lens according to the present invention illustrating the profile of the echelette in an intermediate phase plate, bifocal phase plate, and monofocal phase plate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com