About: http://webisa.webdatacommons.org/153560524

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	It was previously well-known to use plastic substrates instead of glass for ophthalmic lenses because plastic substrates offer advantages, such as lighter weight, ease of handling, and ease of formation of articles.
http://www.w3.org/ns/prov#wasQuotedFrom	epo.org