This third-eye breathing technique was taught to me by one of my shamanic guides who works on dreaming topics with me.
To use this technique, one first needs to understand that the third eye is not simply located in your forehead, but is actually centered in the pineal gland, which science has now identified as having optic properties. One can draw a line from the forehead "eye" position, through the pineal, to the back of the head at the base of the skull, which is known as the zeel point (this point is used by many for exiting the body during astral travel.)
Now, using slow breaths, breathe in using your nose through your forehead "eye", to your pineal, and then exhale pushing the breath from your zeel point, through your pineal out your mouth. Do this for several minutes before you fall asleep to activate your third eye and align with your dreaming body, enhancing the dream state.
My shamanic students love this exercise -- let me know how it works for you!

10s6jnm.jpg

brain05.jpg

~Blessings~
Ixchel