'Trataka, a technique used in a meditation practice, is one of the six purification techniques, called shatkarmas, of Hatha yoga. Trataka is a Sanskrit word, which means "to look" or "to gaze." As such, this meditation technique involves staring at a single point of focus. This is typically the flame of a candle, but other objects that may be used include a dot on the wall, an object of worship, a deity, flower, mountain, rising sun or moon. However, a flame is believed to work best.
Meditating in this way is believed to energise the ajna (third eye) chakra, which is associated with intuition and wisdom, as well as psychic abilities. Traditionally, it's said that the practice allows the past, present and future to be perceived with equal clarity.'