{
  "resourceType": "DeviceRequest",
  "id": "left-lens",
  "identifier": [
    {
      "system": "http://www.happysight.com/prescription",
      "value": "15013L"
    }
  ],
  "groupIdentifier": {
    "system": "http://acme.org",
    "value": "15013"
  },
  "status": "completed",
  "intent": "original-order",
  "codeCodeableConcept": {
    "coding": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct",
        "code": "lens"
      }
    ]
  },
  "parameter": [
    {
      "code": {
        "coding": [
          {
            "system": "http://loinc.org",
            "code": "28842-3",
            "display": "Sphere distance Glasses prescription.lens - left"
          }
        ],
        "text": "sphere, left lens"
      },
      "valueQuantity": {
        "value": -1.0,
        "unit": "Diopter",
        "system": "http://unitsofmeasure.org",
        "code": "[diop]"
      }
    },
    {
      "code": {
        "coding": [
          {
            "system": "http://loinc.org",
            "code": "28843-1",
            "display": "Cylinder base distance Glasses prescription.lens - left"
          }
        ],
        "text": "cylinder, left lens"
      },
      "valueQuantity": {
        "value": -0.5,
        "unit": "Diopter",
        "system": "http://unitsofmeasure.org",
        "code": "[diop]"
      }
    },
    {
      "code": {
        "coding": [
          {
            "system": "http://loinc.org",
            "code": "28844-9",
            "display": " Axis distance Glasses prescription.lens - left"
          }
        ],
        "text": "axis, left lens"
      },
      "valueQuantity": {
        "value": 180,
        "unit": "Degrees",
        "system": "http://unitsofmeasure.org",
        "code": "deg"
      }
    }
  ],
  "subject": {
    "reference": "Patient/example"
  },
  "occurrenceDateTime": "2014-06-15",
  "requester": {
    "reference": "Practitioner/example"
  },
  "meta": {
    "tag": [
      {
        "system": "http://terminology.hl7.org/CodeSystem/v3-ActReason",
        "code": "HTEST",
        "display": "test health data"
      }
    ]
  }
}