Have been reading multiple reports of people's Apple iPhone X Face ID not working when they are wearing Oakley Sunglasses. Face ID replaced the fingerprint (Touch ID) on the iPhone X after they were unable to successfully integrate a fingerprint scanner into the X's edge to edge screen. Know that Google had previously solved this on their latest Galaxy by moving the fingerprint scanner to the back.
Apparently Face ID uses an Infrared Camera which will work with some Sunglasses, but with specific pairs, particularly Polarized/Iridium Oakleys that block more IR, it can't scan the face confidently enough to unlock. Included a quote below explaining it.
Anybody here have the iPhone X and experienced this? Would argue it's a nice differentiator of higher quality sunglasses!
Source for quote above: Interview: Apple’s Craig Federighi answers some burning questions about Face ID