snip from unspeakable black source (as to not offend Larmoyant Neurotics)
The third eye, along with the sixth chakra controls the eyesight, the sinuses and the skin. It is with the third eye that we can see auras, do scrying and see energy. The pineal gland and the sixth chakra are behind the third eye.
The third eye is the front of the 6th chakra. The 6th chakra is where the ida and pingala serpents meet. When the kundalini pierces this chakra, it opens the last of the three knots. A flash of light is often experienced when this occurs. Opening the 3rd eye is a major step in consciousness.