Case 1: "Look at the phone straight-ahead with your eyes or we'll beat you with the rubber-hose again"
Case 2: Hold open the eyelids with tape. Even if the eyes have rolled-back in their sockets they can be re-positioned with some manual adjustment enough to get the system to work.
This seems extremely inconvenient for binge drinkers* that need to Uber home or call a friend.
*or light drug users