The Evil Eye is a common concept in many cultures around the world. The Evil Eye is sort of like a curse, where the person who has been looked upon with it will face misfortunes. The Evil Eye can occur in various ways, depending on the culture. In most, the Evil Eye occurs when someone looks at you and envies what you have. In some cultures, the Evil Eye can be cast, so to speak, on purpose.
The Evil Eye beliefs are most common in the Mediterranean and in West Asia, although these beliefs have spread as far as South America. In many areas in the Mediterranean and Middle East, it is believed that people with green eyes are more likely to be able to cast the Evil Eye than those with brown. Those with blue eyes are the most likely to be able to accidentally, or purposely, use this power.
Eye symbols and talismans are often used as a sort of defense against the Evil Eye. For instance, the above image was one method used by the Egyptians. Normally the eye above is referred to as the Wedjat or The Eye of Horus. It was often used as a symbol of protection and one of its functions was to ward off the Evil Eye.