> ## Documentation Index
> Fetch the complete documentation index at: https://docs.metriport.com/llms.txt
> Use this file to discover all available pages before exploring further.

# VisionPrescription

> An authorization for the provision of glasses and/or contact lenses to a patient.

## Properties

| Name | Required | Type | Description |
| - | - | - | - |
| identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | Business Identifier for vision prescription |
| status | Yes | code | active / cancelled / draft / entered-in-error |
| created | Yes | dateTime | Response creation date |
| patient | Yes | Reference\<[Patient](/medical-api/fhir/resources/patient)> | Who prescription is for |
| encounter | No | Reference\<[Encounter](/medical-api/fhir/resources/encounter)> | Created during encounter / admission / stay |
| dateWritten | Yes | dateTime | When prescription was authorized |
| prescriber | Yes | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole)> | Who authorized the vision prescription |
| lensSpecification | Yes | VisionPrescriptionLensSpecification | Vision lens authorization |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized |
| - product | Yes | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Product to be supplied |
| - eye | Yes | code | right / left |
| - sphere | No | decimal | Power of the lens |
| - cylinder | No | decimal | Lens power for astigmatism |
| - axis | No | integer | Lens meridian which contain no power for astigmatism |
| - prism | No | VisionPrescriptionLensSpecificationPrism | Eye alignment compensation |
| - id | No | string | Unique id for inter-element referencing |
| - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized |
| - amount | Yes | decimal | Amount of adjustment |
| - base | Yes | code | up / down / in / out |
| - add | No | decimal | Added power for multifocal levels |
| - power | No | decimal | Contact lens power |
| - backCurve | No | decimal | Contact lens back curvature |
| - diameter | No | decimal | Contact lens diameter |
| - duration | No | [Quantity](/medical-api/fhir/data-types/quantity) | Lens wear duration |
| - color | No | string | Color required |
| - brand | No | string | Brand required |
| - note | No | [Annotation](/medical-api/fhir/data-types/annotation)\[] | Notes for coatings |

## Search Parameters

| Name | Type | Description | Expression |
| - | - | - | - |
| identifier | token | Return prescriptions with this external identifier | VisionPrescription.identifier |
| patient | reference | The identity of a patient to list dispenses for | VisionPrescription.patient |
| encounter | reference | Return prescriptions with this encounter identifier | VisionPrescription.encounter |
| datewritten | date | Return prescriptions written on this date | VisionPrescription.dateWritten |
| prescriber | reference | Who authorized the vision prescription | VisionPrescription.prescriber |
| status | token | The status of the vision prescription | VisionPrescription.status |

## Inherited Properties

| Name | Required | Type | Description |
| - | - | - | - |
| id | No | string | Logical id of this artifact |
| meta | No | [Meta](/medical-api/fhir/data-types/meta) | Metadata about the resource |
| implicitRules | No | uri | A set of rules under which this content was created |
| language | No | code | Language of the resource content |
| text | No | [Narrative](/medical-api/fhir/data-types/narrative) | Text summary of the resource, for human interpretation |
| contained | No | Resource\[] | Contained, inline Resources |
| extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations |
| modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored |

To view the FHIR specification for this resource, see [VisionPrescription](https://www.hl7.org/fhir/StructureDefinition/VisionPrescription).


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