---
title: role
framework: coremedia
role: symbol
role_heading: Instance Property
path: coremedia/cmformatdescription/extensions-swift.struct/value/cameracalibrationdatalenscollection/calibration/role
---

# role

Specifies the particular use of the lens in the camera system (e.g., left or right for a stereo system).

## Declaration

```swift
var role: CMFormatDescription.Extensions.Value.CameraCalibrationDataLensCollection.LensRole
```