Tratak Meditation is a traditional basic exercise to acquire concentration and control the mental waves. Tratak (fixed gazing) is an ancient yogic technique that concentrates the mind, opens the psychic centers and awakens the life force at the base of the spine taking one deep into meditation. It brings: Controls of  ciliary reflex, Excitation of lachrymal glands, Stimulation of pineal glands, Relieving of body, interior peace, Improvement of the sight, Fortification of the will and Improvement of the memory and the concentration.

PS: One may require more than one session generally to grasp the vast subject~ Meditation on Light.