Left Lens prescription using the parameters element (id = "left-lens")

<?xml version="1.0" encoding="UTF-8"?>

<DeviceRequest xmlns="http://hl7.org/fhir">
  <id value="left-lens"/> 
  <text> <status value="generated"/> <div xmlns="http://www.w3.org/1999/xhtml"><p> <b> Generated Narrative: DeviceRequest</b> <a name="left-lens"> </a> <a name="hcleft-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> : <code> http://www.happysight.com/prescription</code> /15013L</p> <p> <b> groupIdentifier</b> : <span title="  insert contents here  "><code> http://acme.org</code> /15013</span> </p> <p> <b> status</b> : completed</p> <p> <b> intent</b> : original-order</p> <h3> Codes</h3> <table class="grid"><tr> <td style="display: none">-</td> <td> <b> Concept</b> </td> </tr> <tr> <td style="display: none">*</td> <td> Lens <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/5.5.0/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;Left glasses lens prescription Sphere far&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;Left glasses lens prescription Cylinder far&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;Left glasses lens prescription Axis far&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> </text> <identifier> 
    <system value="http://www.happysight.com/prescription"/> 
    <value value="15013L"/> 
  </identifier> 
      <!--    insert contents here    -->
  <groupIdentifier> 
    <system value="http://acme.org"/> 
    <value value="15013"/> 
  </groupIdentifier> 
  <status value="completed"/> 
  <intent value="original-order"/> 
  <code> 
    <concept> 
      <coding> 
        <system value="http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct"/> 
        <code value="lens"/> 
      </coding> 
    </concept> 
  </code> 
  <parameter> 
    <code> 
      <coding> 
        <system value="http://loinc.org"/> 
          <code value="28842-3"/> 
        <display value="Left glasses lens prescription Sphere far"/> 
      </coding> 
      <text value="sphere, left lens"/> 
    </code> 
    <valueQuantity> 
      <value value="-1.00"/> 
      <unit value="Diopter"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="[diop]">
      </code> 
    </valueQuantity> 
  </parameter> 
  <parameter> 
    <code> 
      <coding> 
        <system value="http://loinc.org"/> 
        <code value="28843-1"/> 
        <display value="Left glasses lens prescription Cylinder far"/> 
      </coding> 
      <text value="cylinder, left lens"/> 
    </code> 
    <valueQuantity> 
      <value value="-0.50"/> 
      <unit value="Diopter"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="[diop]">
      </code> 
    </valueQuantity> 
  </parameter> 
  <parameter> 
    <code> 
      <coding> 
        <system value="http://loinc.org"/> 
        <code value="28844-9"/> 
        <display value="Left glasses lens prescription Axis far"/> 
      </coding> 
      <text value="axis, left lens"/> 
    </code> 
    <valueQuantity> 
      <value value="180"/> 
      <unit value="Degrees"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="deg">
      </code> 
    </valueQuantity> 
  </parameter> 
  <subject> 
    <reference value="Patient/example"/> 
  </subject> 
  <occurrenceDateTime value="2014-06-15"/> 
  <requester> 
    <reference value="Practitioner/example"/> 
  </requester> 
</DeviceRequest>