A quasi-universal symbol of protection, the evil eye is referred to as μάτι (mati) in Greek. The concept and the significance of the evil eye is especially prominent in the Mediterranean and West Asia.
The evil eye is a “look” or “stare” that is believed to bring bad luck for the person at whom it is directed for reasons of envy or dislike. The perception of the nature of the phenomenon, its causes, and possible protective measures, varies between tribes and cultures. The evil eye is a talisman that is meant to protect you from these evil spirits. Evil eyes protect you from negative energy and having them in jewellery that's always in the forefront can reverse the effects.