---
title: sphere
framework: healthkit
role: symbol
role_heading: Instance Property
path: healthkit/hklensspecification/sphere
---

# sphere

The correction for farsightedness.

## Declaration

```swift
@NSCopying var sphere: HKQuantity { get }
```

## Discussion

Discussion This quantity uses diopter() units. The range is -10.5 to +6.5.

## See Also

### Accessing lens specification data

- [cylinder](healthkit/hklensspecification/cylinder.md)
- [axis](healthkit/hklensspecification/axis.md)
- [addPower](healthkit/hklensspecification/addpower.md)