This case-sensitive code system http://terminology.hl7.org/CodeSystem/ex-visionprescriptionproduct defines the following codes:

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.
 <status value="draft"/> <experimental value="false"/> <date value="2024-03-09T11:11:30-07:00"/> <publisher value="Health Level Seven International"/> <contact> <telecom> <system value="url"/> <value value="http://hl7.org"/> </telecom> <telecom> <system value="email"/> <value value="hq@HL7.org"/> </telecom> </contact> <description value="This value set includes a smattering of Prescription Product codes."/> <copyright value="This material derives from the HL7 Terminology (THO). THO is copyright ©1989+ Health Level Seven International and is made available under the CC0 designation. For more licensing information see: https://terminology.hl7.org/license"/> <caseSensitive value="true"/> <valueSet value="http://terminology.hl7.org/ValueSet/vision-product"/> <content value="complete"/> <concept> <code value="lens"/> <display value="Lens"/> <definition value="A lens to be fitted to a frame to comprise a pair of glasses."/> </concept> <concept> <code value="contact"/> <display value="Contact Lens"/> <definition value="A lens to be fitted for wearing directly on an eye."/> </concept> </CodeSystem>