The third eye or Ajna meaning 'command' or 'summoning' is the sixth primary chakra according to Hindu tradition.
Ajna translates as 'command', and is considered as the eye of intuition. When something is seen in the mind's eye, or in a dream, it is being 'seen' by Ajna.
Spiritual energy from the external environments enter the body through this gateway. The various religious marks one sees on the foreheads of men and women belonging to the Hindu faith are thus the blessed spiritual prasadam of their respective form of the Hindu gods.