About: http://webisa.webdatacommons.org/217996391

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	Explains how vision problems such as myopia and hyperopia can be corrected with lenses that help focus light on the retina.
http://www.w3.org/ns/prov#wasQuotedFrom	ck12.org