Third Eye Theory

I’ve been thinking about the relationship between the “third eye” concept, and the biological/anatomical fact that our pineal gland has a “vestigial” eye, related to how that gland regulates melatonin production by reference to whether it is day or night outside. Maybe a way of thinking about “opening the third eye” is not that you are really “opening” it, but starting to pay attention to what has been telling you all along -