Eye of Horus

Based on this famous myth, the Eye of Horus became a sacred symbol of sacrifice, healing, regeneration, wholeness, and protection in ancient Egypt.

As such, its symbol was often carved into amulets and jewelry made of gold, silver, porcelain, lapis, wood, and carnelian, to ensure the health and protection of the wearers and offer them prosperity and wisdom.
It was also carved into funerary monuments to offer the souls of the departed safe passage to the underworld and the afterlife. The eye is also used as a hieroglyph and represents fractional calculations.

Eye of Horus (Left Eye)

Related to the Moon
Symbol of protection
Symbol of power
Symbol of wellbeing and health
Symbol of sacrifice
Used to ward off evil
Used as a measuring system

The eye of Horus was seen as an omnipresent, omniscient symbol of protection by the ancient Egyptians.