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# HKMetadataKeyGlassesPrescriptionDescription

A description of the glasses prescription.

```
let HKMetadataKeyGlassesPrescriptionDescription: String
```

## Discussion

If a glasses prescription was designed for a particular use, like reading or distance, use this metadata key to describe that use.

This metadata key stores a <doc://com.apple.documentation/documentation/Swift/String> value.

---

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