reference (RCDReferences)

b2boptic → items → item → pair → lens → centration → eyeRotationCenterDistance

values	description
CORNEA	distance from eyerotationcenter to the cornea vertex
FRAME	distance from eyerotationcenter to the glass vertex (distance includes the HSA)

<xs:simpleType name="RCDReferences">
  <xs:restriction base="xs:string">
    <xs:enumeration value="CORNEA" />
    <xs:enumeration value="FRAME" />
  </xs:restriction>
</xs:simpleType>