About: http://webisa.webdatacommons.org/233114025

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 are designed to prevent light from entering the lens from the side of the front element, causing flare and other aberrations.
http://www.w3.org/ns/prov#wasQuotedFrom	dinobulk.com