---
title: HKPrismBase.in
framework: healthkit
role: symbol
role_heading: Case
path: healthkit/hkprismbase/in
---

# HKPrismBase.in

The prism base is on the inside edge of the lens.

## Declaration

```swift
case `in`
```

## Discussion

Discussion You can only use this value for the prism’s horizontalBase.

## See Also

### Prism Base

- [HKPrismBase.none](healthkit/hkprismbase/none.md)
- [HKPrismBase.up](healthkit/hkprismbase/up.md)
- [HKPrismBase.down](healthkit/hkprismbase/down.md)
- [HKPrismBase.out](healthkit/hkprismbase/out.md)