Left Lens prescription using the parameters element

{
  "resourceType": "DeviceRequest",
  "id": "left-lens",
  "text": {
    "status": "generated",
    "div": "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: DeviceRequest</b><a name=\"left-lens\"> </a></p><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Resource DeviceRequest &quot;left-lens&quot; </p></div><p><b>identifier</b>: id: 15013L</p><p><b>groupIdentifier</b>: <span title=\"  insert contents here  \">id: 15013</span></p><p><b>status</b>: completed</p><p><b>intent</b>: original-order</p><h3>Codes</h3><table class=\"grid\"><tr><td>-</td><td><b>Concept</b></td></tr><tr><td>*</td><td>Lens <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/3.1.0/CodeSystem-ex-visionprescriptionproduct.html\">Example Vision Prescription Product Codes</a>#lens)</span></td></tr></table><blockquote><p><b>parameter</b></p><p><b>code</b>: sphere, left lens <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#28842-3 &quot;Sphere distance Glasses prescription.lens - left&quot;)</span></p><p><b>value</b>: -1.00 Diopter<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM code [diop] = 'diop')</span></p></blockquote><blockquote><p><b>parameter</b></p><p><b>code</b>: cylinder, left lens <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#28843-1 &quot;Cylinder base distance Glasses prescription.lens - left&quot;)</span></p><p><b>value</b>: -0.50 Diopter<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM code [diop] = 'diop')</span></p></blockquote><blockquote><p><b>parameter</b></p><p><b>code</b>: axis, left lens <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#28844-9 &quot; Axis distance Glasses prescription.lens - left&quot;)</span></p><p><b>value</b>: 180 Degrees<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM code deg = 'deg')</span></p></blockquote><p><b>subject</b>: <a href=\"patient-example.html\">Patient/example</a> &quot;Peter CHALMERS&quot;</p><p><b>occurrence</b>: 2014-06-15</p><p><b>requester</b>: <a href=\"practitioner-example.html\">Practitioner/example</a> &quot;Adam CAREFUL&quot;</p></div>"
  },
  "identifier": [
    {
      "system": "http://www.happysight.com/prescription",
      "value": "15013L"
    }
  ],
  "groupIdentifier": {
    "system": "http://acme.org",
    "value": "15013"
  },
  "status": "completed",
  "intent": "original-order",
  "code": {
    "concept": {
      "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": -1.00,
        "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": -0.50,
        "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"
  }
}