My glasses (one pair for reading - 2 other pair are a transitional, bi-focal pair worn when driving or outside when I'll need for reading) are all worn periodically during the day. However, my reading glasses, which have half-lens, are different from the others which are rimless.
I was concerned (first Face ID activation wearing my reading glasses) my eyes might somehow be obscured or I'd have to view the Home Screen in some awkward way. However, Face ID worked / has continually worked without issue when wearing these glasses.
I've tried my sunglasses (about a half dozen, inside tests where ambient light conditions were towards the dark / shady spectrum) which have custom clip-on for my rimless glasses. The clip-on lens are brown in color, polarized, but do not block my eyes from being visible (as say, a reflective lens would). Face ID has worked reliably. ...I've read as long as sunglasses have lens whereby one's eyes can be seen by the TrueDepth camera, then, Face ID will work. I don't know how dark the lens must be before this won't work; but so far, I'm very happy as I can wear all my glasses and Face ID works.
