The third eye is an eye that doesn't serve for physical sight, but we use it to perceive hidden wisdoms and knowledge that our natural eyes cannot. The workings of the third eye, according to some scientific interpretations and spiritual teachings, is caused by the Pineal gland.
When the third eye is fully opened and trained, one is usually able to perceive entities (Spirits, Guides, and Angels) from the astral planes as well as relevant images
Our psychic center of clairvoyance is a natural gift that anyone can develop and enhance to supra sensory levels. In fact, it is the most commonly used of all our psychic centers. The Third Eye, which promotes this faculty, is located within the Sixth Chakra and is the seat of intuition our window to higher dimensions.