focused or "one pointed" awareness or concentration, the ability to focus the mind on an object without distraction for extended periods of time.
/one-pointed: The mind is one-pointed, focused, concentrated (Yoga Sutra 1.32). When the mind has attained the ability to be one-pointed, the real practice of Yoga meditation begins.
Ekagra - one-pointed awareness
Ekagrata - one-pointed awareness or concentration; the ability to focus the mind voluntarily on an object without interruption for extended periods of time.
ta (one-pointed focus) is the first step in the internal practice of yoga, leading to more profound levels of meditation. It is concentration, or the ability to place all of one's attention on a single object that eclipses all distractions.
The one-pointed concentration of mind is termed 'ekagrata'. There are numerous distractions which obstruct ekagrata. Association and identification through the eyes and sight are major contributing factors to this leakage.
Dhāraṇā builds further upon this by refining it further to ta or chitta, that is single-pointed concentration and focus, which is in this context cognate with shamata.
CHANCHALATA (Multiple object, Multiple thoughts),
EKAGRATA ( Single Object, Multiple thoughts)
DHARANA ( Single object, Single thought ),
DHYANA ( Single object , single thought effortlessly) ,
SAMADHI( Only the object with single thought shines) ...
repulsion; something which brings pain or enmity
the state of one - pointed attention ...
He had the highly developed Ekagrata of a Yogi. He could draw, as it were, any single thought from the brain pigeon-hole, dwell on it as long as he liked and could shove it back when finished.
Thus, the use of a drishti allows the mind to focus and move into a deep state of concentration. And the constant application of drishti develops ha, single-pointed focus, an essential yogic technique used to still the mind.
See also: Yoga, Mind, Meditation, Hatha, Prana