Drishti (Sanskrit: दृष्टि, romanized: dṛṣṭi, pronounced [d̪r̩ʂʈɪ], "focused gaze") is a means for developing concentrated intention.
[4][5] In the Bhagavad Gita VI.13, Krishna instructs the hero Arjuna to "hold one's body and head erect in a straight line and stare steadily at the tip of the nose".
[11][12] Iyengar Yoga rarely speaks of Drishtis, but in its instructions for some asanas it tells the practitioner to look in a certain direction, for example upwards in Trikonasana and forwards in Virabhadrasana II.
[9] Sivananda Yoga makes use of two Drishtis, namely Nāsāgre and Bhrūmadhye, for tratak exercise (a purification) rather than in asana practice.
[10] Vishnudevananda cautions that prolonged or incorrect practice may cause problems for the eye muscles or nervous system.