All of this caution is well intended and the basic point is true.
But there is also good cause to simply say: yes the Tibetan traditions posit a third eye, and yes it is central to practice, and yes it is a good thing to develop such faculties.
I would say: it is far more dangerous to 'not see' than to 'see.'
If the heart and the third eye awaken, wholesome things follow ~ Motova, of course you should investigate this, and it is great that you feel a natural curiosity about it.
Good luck in your endeavors.
To Tobes: So can you give an description of what the third eye is? You say Tibetan traditions posit a third eye. Can you say which traditions? You say it is central to practice. Can you say which practice? Have you done this practice yourself?
To Motova: I can say with 100% certainty that buddhism is not about making and holding on to objects. That I am sure about. But of course there are lots of buddhists who do make things real that are not real. That is what we call samsara.
I would rather not speak about my own practice.
But generally speaking, it is connected to the development of the nirmanakaya and in many different practices across all traditions, white light and/or the seed syllable aum is visualised.
It is not particularly secret or esoteric to state these things ~ in the sense that advanced
practices tend to focus on the navel, the heart or throat, and require advanced teachings (and obviously, an advanced teacher).
Clearing the third eye with white light or aum is bread and butter stuff - in many practices it does not require initiation etc; and as I said before, it is far more dangerous to have a blocked third eye than to have a clear one.