Sacred Eyes - Windows of the Soul
Eye of Horas
The Eye of Horas, aka Ra, is the Egyptian symbol that is used both a protective amulet and a tool to use as a gateway between the physical and spiritual planes.
Third Eye - AKA the brow chakra
The Brow Chakra is associated with the color indigo. It is also often referred to as the "third eye" or the "mind center." It is our avenue to wisdom - learning from our experiences and putting them in perspective.
The Evil Eye
The image of the evil eye, which is typically blue in color is to deflect harm or evil intent.
The Eye in the Hand
This page has collected a large number of these interesting images. It also lists the meanings from various cultures.