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by Infernal 3157 days ago
> people will look at an X to unlock it even though it only needs to see you, not the reverse.

It explicitly will not unlock by default unless you are looking at the phone (or have disabled the "attention detection" feature), it detects the direction of your eyes presumably to prevent someone from surreptitiously pointing your phone at your face to unlock it while you are focusing elsewhere.

> By default, Face ID requires eye contact in order to work, but Federighi says you can disable the “attention detection” feature and Face ID will work whether you look directly at it or not.

https://9to5mac.com/2017/09/15/face-id-details-features/