Union of http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct and http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct

This is the CodeSystem that contains all the codes in Example Vision Prescription Product Codes (http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct) and Example Vision Prescription Product Codes (http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: CodeSystem 818959f7-0f8d-4f6f-b46c-7c5a5833d862-494

This code system http://hl7.org/fhir/comparison/CodeSystem/818959f7-0f8d-4f6f-b46c-7c5a5833d862-494 defines codes, but no codes are represented here

CodeDisplayDefinition
lens LensA lens to be fitted to a frame to comprise a pair of glasses.
contact Contact LensA lens to be fitted for wearing directly on an eye.