[adameast9000]

FaceID works with my regular glasses but some of my sunglasses do not work at all (0% unlock rate with over 100 attempts in various lighting). I think it may depend on the shape of the frame and how much of your face it takes up? Not sure.

[dkonofalski]

It has to do with polarization of the lenses and the "Require attention" feature of FaceID. The notch cameras can't determine if your eyes are looking at the camera if you're wearing polarized sunglasses (depending on the type of polarization) so having that setting on will give you a 100% failure rate with something that's covering your eyes.

[marrone12]

There is an option inside of face id settings that says "require attention". This basically means it looks for your actual pupils to unlock. if you turn this off then sunglasses will start to work, as well as off angle unlocks without sunglasses.