Generated Narrative: StructureDefinition OwnLensDuringVATestSpecification Name Flags Card. Type Description & Constraints Extension 0..* Extension Extension extension 1..* Extension Extension Slices for extension Content/Rules for all slices extension:BasedOn 0..* Extension Where the Lens Data comes fro url 1..1 uri "BasedOn" value[x] 0..1 Reference() Where the Lens Data is coming from extension:product 1..1 Extension Lens Product Worn during VA test url 1..1 uri "product" value[x] 0..1 CodeableConcept Value of extension extension:sphere 0..* Extension Power of the lens url 1..1 uri "sphere" value[x] 0..1 decimal Value of extension extension:cylinder 0..* Extension Lens power for astigmatism url 1..1 uri "cylinder" value[x] 0..1 Value of extension valueDecimal decimal valueQuantity Quantity extension:axis 0..* Extension Lens meridian which contain no power for astigmatism url 1..1 uri "axis" value[x] 0..1 integer Value of extension extension:PrismAmount 0..* Extension Amount of adjustment url 1..1 uri "PrismAmount" value[x] 0..1 decimal Value of extension extension:PrismBaseDirection 0..* Extension The relative base, or reference lens edge, for the prism. url 1..1 uri "PrismBaseDirection" value[x] 0..1 ?pkp-2?, ?pkp-2?, ?pkp-2?, ?pkp-2? Value of extension extension:add 0..* Extension Added power for multifocal levels url 1..1 uri "add" value[x] 0..1 decimal Value of extension extension:power 0..* Extension Contact lens power url 1..1 uri "power" value[x] 0..1 decimal Value of extension extension:backCurve 0..* Extension Contact lens back curvature url 1..1 uri "backCurve" value[x] 0..1 decimal Value of extension extension:diameter 0..* Extension Contact lens diameter url 1..1 uri "diameter" value[x] 0..1 decimal Value of extension extension:duration 0..* Extension Lens wear duration url 1..1 uri "duration" value[x] 0..1 Quantity Value of extension extension:color 0..* Extension Extension url 1..1 uri "color" value[x] 0..1 string Value of extension extension:brand 0..* Extension Extension url 1..1 uri "brand" value[x] 0..1 string Value of extension extension:note 0..* Extension Extension url 1..1 uri "note" value[x] 0..1 string Value of extension url 1..1 uri "https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/OwnLensDuringVATestSpecification" value[x] 0..0 Documentation for this format
Specification of the Lens that was worn during the Visual Acuity test test
All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Must have either extensions or value[x], not both
exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])
Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Extensions are always sliced by (at least) url
exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")])
Lens Data may originate from Corrective Device Resource of Glasses or Contacts, or from Lensmeter Measurement, of from manual input.
Additional content defined by implementations
May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Source of the definition for the extension code - a logical name or a URL.
The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
The Lens Data may come from either a Device Resource, a Lensmeter observation or explicit data entry.
Identifies the type of vision correction product which is required for the patient. Need to identify whether glasses or contacts.
Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).
Lens power measured in dioptres (0.25 units)
Power adjustment for astigmatism measured in dioptres (0.25 units).
Lens meridian which contain no power for astigmatism
Adjustment for astigmatism measured in integer degrees.
Amount of prism to compensate for eye alignment in fractional units.
The relative base, or reference lens edge, for the prism.
Power adjustment for multifocal lenses measured in dioptres (0.25 units).
Contact lens power measured in dioptres (0.25 units).
Contact lens diameter measured in millimetres.
n The recommended maximum wear period for the lens.