A transform matrix indicating the position and orientation of the face's left eye.
- iOS 12.0+
The translation aspect of this matrix indicates the position of the center of the eyeball, relative to the position represented by the anchor's
transform. The positive z-axis points from the center of the eyeball in the direction of the pupil.
Rotational aspects of the matrix indicate the orientation of the eyeball—for example, a rotation about the x-axis directs the pupil upward or downward. The eye does not rotate about the z-axis.