{
  "package" : "hl7.fhir.r4.examples@4.0.1",
  "definition" : "Traditional full threshold staircase strategy. Initial intensities are presented, based on anchor point sensitivities in each quadrant and based on already known neighboring sensitivities. In a first run, thresholds are changed in 4dB steps until the first response reversal. Then the threshold is changed in 2 dB steps until the second response reversal. The threshold is calculated as the average between the last seen and last not-seen stimulus, supposed to correspond with the 50% point in the frequency-of-seeing curve",
  "system" : "http://dicom.nema.org/resources/ontology/DCM",
  "property" : [ ],
  "codesystem" : "5f336dd4-db81-5653-939a-25648922f08e",
  "concept_id" : "ab49b465-dba6-5804-9139-dae1a7d39bfc",
  "ancestors" : {
    "111827" : 0
  },
  "id" : "103b9820-e8b5-4761-851a-ac3e86300f90",
  "code" : "111827",
  "display" : "Visual Field Normal Test Strategy",
  "version" : "01"
}