About: http://webisa.webdatacommons.org/146048295

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 tearing, or if you sustain an injury to the eye.
http://www.w3.org/ns/prov#wasQuotedFrom	hopkinsmedicine.org