About: http://webisa.webdatacommons.org/129327892

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 is believed that symptoms such as discomfort will most often appear if this difference in optical performance goes beyond a certain level.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com