>>7654872 (OP)This is clearly a photo taken at an angle. You can tell by how the side of the skull is at an angle too.
Anatomically speaking eyes can angle quite a lot.
No idea what the limits are though. You can probably google that, just use the proper term, which is eye or palpebral slant.
Also, why is this information relevant? Just draw either what you see or what you think looks appealing.