Eyes are the windows of the soul and you can see what a person is up to by looking into his eyes. Hence, it is important to have clean eyesight. In yoga, trataka is a technique devised by the ancient sages to improve eyesight. It is a shuddhikriya or a purification process to cleanse the eyesight and help in the silencing of the mind in concentration.
Sit with your back straight. Keep your eyes fixed on an object without winking till tears start streaming down your face. T...