This is a tantric method of meditation that involves staring at a single point such as a candle flame, to bring energy to the "third eye" to develop our psychic abilities and see beyond the physical world.
By fixing the gaze the restless mind too comes to a halt. It is said also that control of the ciliary (blink) reflex stimulates the pineal gland, which Kundalini Yoga identify with the third eye. Trāṭaka is said to enhance the ability to concentrate. It increases the power of memory and brings the mind to a state of awareness, attention and focus.
We will focus on various things including a candle light, I will share my screen and provide all the visuals.