About: http://webisa.webdatacommons.org/138538507

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	They use their skills and instruments to diagnose vision problems or changes, as well as prescribe eye glasses, contact lenses, low vision tools and other products to correct any errors.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com