About: http://webisa.webdatacommons.org/23599130

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	Its products are used by ophthalmologists, optometrists and opticians for correcting vision with glasses or contact lenses, and for screening and diagnosing eye diseases or conditions such as glaucoma and macular degeneration.
http://www.w3.org/ns/prov#wasQuotedFrom	keystoneedge.com