a icon to ilustrate something complex like this
http://resources2.news.com.au/images/2010/06/03/1225874/822850-face-recognition.jpg
The example is very hard to fit in a 14px icon


Maybe something like this?
@AndreLZGava I think that's a bit confusing and too complicate for its purpose, also not gender friendly. If it's a facial recognition "icon", it's better be more simple and focusing on the face pattern like Apple did on the iPhone X.
I use fa-smile for now, but it has no nose to differentiate from an normal emoji smiley.
This is very useful for action buttons that are supposed to trigger biometric authentication through face recognition such as FaceID.
https://static.thenounproject.com/png/1280817-200.png
https://cdn3.iconfinder.com/data/icons/new-apple-product-solid/24/face_recognition-512.png
https://cdn.iconscout.com/icon/premium/png-256-thumb/biometric-faceid-501498.png
Most helpful comment
Maybe something like this?