Mudra - A Sanskrit word meaning seal, mark or gesture.
Used a symbolic ritual pose to channel specific energies or invoke states of being.
This one in particular is called the gyan or "chin" mudra.
It is used to strengthen the connection to our higher self and to help enter a more receptive state.
Also to calm the mind and brighten the mood.
In this design, the eye in the center represents the awareness of the higher self, a bridge between who we are and what we are cultivating a connection to.