About: http://webisa.webdatacommons.org/186289439

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 one to two years, unless you experience any problems such as visual changes, pain, flashes of light, new floaters, or
http://www.w3.org/ns/prov#wasQuotedFrom	nyp.org