People always think this shit is like parlour tricks.. Its really not that simple. I also would not recommend an unitiated person to do this.. You should be lead by a mentor and a school.. Even in the ancient mystery schools, they were not given things or taught things wihtout being ready...
There are protocols done by many powerful industries to help prevent us from opening these faculties. Comlpetely opening the third eye chakra causes immense life changes and spiritual transformation.. If you don't have the foundational energies to support doing so, it can be very damaging to ones life..
How do I know? I've had my third eye chakra wide open for many years. It's a scary thing in many ways.. but I was lead through a process of first strengthening my foundational energies.. and being able to support it.. Even then, I couldn't fully support it.. and eventually had to work for years to come back to normal societal level of energy. Opening faculties like my third eye and crown chakra made me drift far from society.. but I learned so much about this life, and you see things , you can see behind the veil.. Evocations you will see the spirit although I was taught not to talk about this to laymen/non initiates outside of my circle.. regardless, I'm far removed now so it doesn't matter.
With that being said, there are mantras, mudras that are very specific to helping this. As much as I would like to share, these are considered "secrets" and I keep them "sacred."
However I will give you some supplements that can help speed up the process: EDTA (take on empty stomach), Niacin (b3) can cause flushing and severe itching of the skin.. its harmless though. it opens up the capillaries and also decalcifies the glands related to third eye, Borax crystals (most information will warn you against ingesting this, but they're fools trying to hide the truth).. You will HAVE to take these in order for things to happen.. Most people are not powerful enough to decalcify themselves.. because its a real alchemical process.
Having your third eye chakra open is a very lifechanging process and can be hard to live with until you have worked hard on your foundational energies to support it.. If you're ready to turn your life upside down and start an immense spiritual journey, go for it.. You will be attacked by specific entities, you will have a constant battle on your hands.. But you will also be able to see energy, which makes it easier to mold and move it.. It creates great intuition and discernment.. but also can make people think you are schizophrenic. What balances a strong third eye out is a powerful sacral chakra.. Sacral chakra allows you to see things "as they are".. and not as something else. Why is this important? The beings you will see have no physical image.. they will shift, they will trick and tease you, come to you as family that passed, as friends, as strange visions.. Ultimately they're fucking with you..
Man I can't say enough about this stuff.. but i would advise against it 100x