<DeviceRequest xmlns="http://hl7.org/fhir"><id value="left-lens"/><identifier><system value="http://www.happysight.com/prescription"/><value value="15013L"/></identifier><groupIdentifier><system value="http://acme.org"/><value value="15013"/></groupIdentifier><status value="completed"/><intent value="original-order"/><productCodeableConcept><coding><system value="http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct"/><code value="lens"/></coding></productCodeableConcept><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]"/></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]"/></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"/></valueQuantity></parameter><subject><reference value="Patient/example"/></subject><occurrenceDateTime value="2014-06-15"/><requester><reference value="Practitioner/example"/></requester></DeviceRequest>