Rotating

Select View > Rotate, or click Rotate in the View toolbar.

Drag the pointer vertically to rotate the eye around the horizontal axis or horizontally to rotate the eye around the vertical axis.

The eye is rotated accordingly

Note that you do not have to use the viewing tool commands or icons to rotate an object. For quick access, you can also use just the mouse: press and hold down the middle mouse button, then the left (or right) mouse button, and drag (still holding both buttons down).

Before After