---
title: HIDUsage.EyeAndHeadTrackersUsage.optimumTrackingDistance
framework: corehid
role: symbol
role_heading: Case
path: corehid/hidusage/eyeandheadtrackersusage/optimumtrackingdistance
---

# HIDUsage.EyeAndHeadTrackersUsage.optimumTrackingDistance

## Declaration

```swift
case optimumTrackingDistance
```