Jai Sri Hari Yash ji,

Yes, you are correct, there is a practice called Tratak. I do use it as well. I promise you, this has nothing to do with Chakra energy awakening.

Plus, in this practice, one has to stare at a flame (light) at your eye level at 3 feet apart from where you are. Sit like a rock in a meditative posture. Here is one wonderful article by our Guruji:

https://os.me/trataka-the-practice-of-still-gaze/

Sending all my love and respect. 💓🙏