---
title: HKPrismBase.none
framework: healthkit
role: symbol
role_heading: Case
path: healthkit/hkprismbase/none
---

# HKPrismBase.none

No prism correction.

## Declaration

```swift
case none
```

## See Also

### Prism Base

- [HKPrismBase.up](healthkit/hkprismbase/up.md)
- [HKPrismBase.down](healthkit/hkprismbase/down.md)
- [HKPrismBase.in](healthkit/hkprismbase/in.md)
- [HKPrismBase.out](healthkit/hkprismbase/out.md)