This page is part of the FHIR Specification v6.0.0-ballot3: Release 6 Ballot (3rd Draft) (see Ballot Notes). The current version is 5.0.0.  For a full list of available versions, see the Directory of published versions 
| Orders and Observations  Work Group | Maturity Level: 3 | Trial Use | Security Category: Patient | Compartments: Encounter, Patient, Practitioner | 
Detailed Descriptions for the elements in the VisionPrescription resource.
| VisionPrescription | |
| Element Id | VisionPrescription | 
| Definition | An authorization for the provision of glasses and/or contact lenses to a patient. | 
| Short Display | Prescription for vision correction products for a patient | 
| Cardinality | 0..* | 
| Type | DomainResource | 
| Summary | false | 
| VisionPrescription.identifier | |
| Element Id | VisionPrescription.identifier | 
| Definition | A unique identifier assigned to this vision prescription. | 
| Short Display | Business Identifier for vision prescription | 
| Note | This is a business identifier, not a resource identifier (see discussion) | 
| Cardinality | 0..* | 
| Type | Identifier | 
| Requirements | Allows vision prescriptions to be distinguished and referenced. | 
| Summary | false | 
| VisionPrescription.basedOn | |
| Element Id | VisionPrescription.basedOn | 
| Definition | Plan/proposal/order/request fulfilled by this prescription. | 
| Short Display | What prescription fulfills | 
| Cardinality | 0..* | 
| Type | Reference(CarePlan | RequestOrchestration | NutritionOrder | ServiceRequest) | 
| Summary | true | 
| VisionPrescription.status | |
| Element Id | VisionPrescription.status | 
| Definition | The status of the resource instance. | 
| Short Display | active | cancelled | draft | entered-in-error | 
| Cardinality | 1..1 | 
| Terminology Binding | Financial Resource Status Codes (Required) | 
| Type | code | 
| Is Modifier | true (Reason: This element is labelled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid) | 
| Requirements | Need to track the status of the resource as 'draft' resources may undergo further edits while 'active' resources are immutable and may only have their status changed to 'cancelled'. | 
| Summary | true | 
| Comments | This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid. | 
| VisionPrescription.created | |
| Element Id | VisionPrescription.created | 
| Definition | The date this resource was created. | 
| Short Display | Response creation date | 
| Cardinality | 1..1 | 
| Type | dateTime | 
| Requirements | Need to record a timestamp for use by both the recipient and the issuer. | 
| Summary | true | 
| VisionPrescription.patient | |
| Element Id | VisionPrescription.patient | 
| Definition | A resource reference to the person to whom the vision prescription applies. | 
| Short Display | Who prescription is for | 
| Cardinality | 1..1 | 
| Type | Reference(Patient) | 
| Requirements | Needed to identify the patient for whom the vision prescription has been issued. | 
| Summary | true | 
| VisionPrescription.encounter | |
| Element Id | VisionPrescription.encounter | 
| Definition | A reference to a resource that identifies the particular occurrence of contact between patient and health care provider during which the prescription was issued. | 
| Short Display | Created during encounter / admission / stay | 
| Cardinality | 0..1 | 
| Type | Reference(Encounter) | 
| Requirements | Used in some jurisdictions to link clinical events to claim items. | 
| Summary | false | 
| VisionPrescription.dateWritten | |
| Element Id | VisionPrescription.dateWritten | 
| Definition | The date (and perhaps time) when the prescription was written. | 
| Short Display | When prescription was authorized | 
| Cardinality | 1..1 | 
| Type | dateTime | 
| Requirements | Need to record a timestamp for use by both the recipient and the issuer. | 
| Summary | true | 
| Comments | Jurisdictions determine the valid lifetime of a prescription. Typically vision prescriptions are valid for two years from the date written. | 
| VisionPrescription.prescriber | |
| Element Id | VisionPrescription.prescriber | 
| Definition | The healthcare professional responsible for authorizing the prescription. | 
| Short Display | Who authorized the vision prescription | 
| Cardinality | 1..1 | 
| Type | Reference(Practitioner | PractitionerRole) | 
| Requirements | Need to record the authorizing practitioner. | 
| Summary | true | 
| VisionPrescription.lensSpecification | |
| Element Id | VisionPrescription.lensSpecification | 
| Definition | Contain the details of the individual lens specifications and serves as the authorization for the fullfillment by certified professionals. | 
| Short Display | Vision lens authorization | 
| Cardinality | 1..* | 
| Summary | true | 
| VisionPrescription.lensSpecification.product | |
| Element Id | VisionPrescription.lensSpecification.product | 
| Definition | Identifies the type of vision correction product which is required for the patient. | 
| Short Display | Product to be supplied | 
| Cardinality | 1..1 | 
| Terminology Binding | Example Vision Prescription Product Codes (Example) | 
| Type | CodeableConcept | 
| Requirements | Need to identify whether glasses or contacts. | 
| Summary | true | 
| VisionPrescription.lensSpecification.eye | |
| Element Id | VisionPrescription.lensSpecification.eye | 
| Definition | The eye for which the lens specification applies. | 
| Short Display | right | left | 
| Cardinality | 1..1 | 
| Terminology Binding | Vision Eyes (Required) | 
| Type | code | 
| Requirements | Needed to identify which eye the lens specification applies to. | 
| Summary | true | 
| Comments | May also appear on the paper claim form or in the Medical Records as as OD (oculus dexter) for the right eye and OS (oculus sinister) for the left eye. | 
| VisionPrescription.lensSpecification.sphere | |
| Element Id | VisionPrescription.lensSpecification.sphere | 
| Definition | Lens power measured in dioptres (0.25 units). | 
| Short Display | Power of the lens | 
| Cardinality | 0..1 | 
| Type | decimal | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| Comments | The value is negative for near-sighted and positive for far sighted. Often insurance will not cover a lens with power between +75 and -75. | 
| VisionPrescription.lensSpecification.cylinder | |
| Element Id | VisionPrescription.lensSpecification.cylinder | 
| Definition | Power adjustment for astigmatism measured in dioptres (0.25 units). | 
| Short Display | Lens power for astigmatism | 
| Cardinality | 0..1 | 
| Type | decimal | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.axis | |
| Element Id | VisionPrescription.lensSpecification.axis | 
| Definition | Adjustment for astigmatism measured in integer degrees. | 
| Short Display | Lens meridian which contain no power for astigmatism | 
| Cardinality | 0..1 | 
| Type | integer | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| Comments | The limits are +180 and -180 degrees. | 
| VisionPrescription.lensSpecification.prism | |
| Element Id | VisionPrescription.lensSpecification.prism | 
| Definition | Allows for adjustment on two axis. | 
| Short Display | Eye alignment compensation | 
| Cardinality | 0..* | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.prism.amount | |
| Element Id | VisionPrescription.lensSpecification.prism.amount | 
| Definition | Amount of prism to compensate for eye alignment in fractional units. | 
| Short Display | Amount of adjustment | 
| Cardinality | 1..1 | 
| Type | decimal | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.prism.base | |
| Element Id | VisionPrescription.lensSpecification.prism.base | 
| Definition | The relative base, or reference lens edge, for the prism. | 
| Short Display | up | down | in | out | 
| Cardinality | 1..1 | 
| Terminology Binding | Vision Base (Required) | 
| Type | code | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.add | |
| Element Id | VisionPrescription.lensSpecification.add | 
| Definition | Power adjustment for multifocal lenses measured in dioptres (0.25 units). | 
| Short Display | Added power for multifocal levels | 
| Cardinality | 0..1 | 
| Type | decimal | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.power | |
| Element Id | VisionPrescription.lensSpecification.power | 
| Definition | Contact lens power measured in dioptres (0.25 units). | 
| Short Display | Contact lens power | 
| Cardinality | 0..1 | 
| Type | decimal | 
| Requirements | Standard contact lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.backCurve | |
| Element Id | VisionPrescription.lensSpecification.backCurve | 
| Definition | Back curvature measured in millimetres. | 
| Short Display | Contact lens back curvature | 
| Cardinality | 0..1 | 
| Type | decimal | 
| Requirements | Standard contact lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.diameter | |
| Element Id | VisionPrescription.lensSpecification.diameter | 
| Definition | Contact lens diameter measured in millimetres. | 
| Short Display | Contact lens diameter | 
| Cardinality | 0..1 | 
| Type | decimal | 
| Requirements | Standard contact lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.duration | |
| Element Id | VisionPrescription.lensSpecification.duration | 
| Definition | The recommended maximum wear period for the lens. | 
| Short Display | Lens wear duration | 
| Cardinality | 0..1 | 
| Type | SimpleQuantity | 
| Requirements | Standard contact lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.color | |
| Element Id | VisionPrescription.lensSpecification.color | 
| Definition | Special color or pattern. | 
| Short Display | Color required | 
| Cardinality | 0..1 | 
| Type | string | 
| Requirements | Standard contact lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.brand | |
| Element Id | VisionPrescription.lensSpecification.brand | 
| Definition | Brand recommendations or restrictions. | 
| Short Display | Brand required | 
| Cardinality | 0..1 | 
| Type | string | 
| Requirements | Standard lens prescription measures. | 
| Summary | false | 
| VisionPrescription.lensSpecification.note | |
| Element Id | VisionPrescription.lensSpecification.note | 
| Definition | Notes for special requirements such as coatings and lens materials. | 
| Short Display | Notes for coatings | 
| Cardinality | 0..* | 
| Type | Annotation | 
| Requirements | Standard lens prescription measures. | 
| Summary | false |