About: http://webisa.webdatacommons.org/258905974

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	every 3 to 5 years, unless you experience any problems such as visual changes, pain, flashes of light, new floaters, or tearing, or if you sustain an injury to the eye.
http://www.w3.org/ns/prov#wasQuotedFrom	ecommunity.com