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# init(rightEyeSpecification:leftEyeSpecification:dateIssued:expirationDate:device:metadata:)

Creates a new glasses prescription sample.

```
convenience init(rightEyeSpecification: HKGlassesLensSpecification?, leftEyeSpecification: HKGlassesLensSpecification?, dateIssued: Date, expirationDate: Date?, device: HKDevice?, metadata: [String : Any]?)
```

## Parameters

`rightEyeSpecification`

The lens specification for the right eye.

`leftEyeSpecification`

The lens specification for the left eye.

`dateIssued`

The date when the doctor issued the prescription.

`expirationDate`

The date when the prescription expires.

`device`

The device that generated the sample.

`metadata`

Additional metadata about the sample.

---

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