Trataka

Trāṭaka (Sanskrit n. त्राटक trāṭaka, tratak, trataka: 'to look, or to gaze') is the practice of staring at some external object. This fixed gazing is a method of meditation which involves concentrating on a single point such as a small object, black dot or candle flame. It is used in yoga as a way of developing concentration, strengthening the eyes, and stimulating the ājňā chakra.