There are vast occult documents that describe the benefits and methods of “opening the third eye”, but all they mean is to enhance the imagination. I’ve striped away the occult mumbo-jumbo and reduced the process to simple neurology. — This is how your brain works — This is how to improve your imagination.
This audio CD course contains a step-by-step progression of exercises designed to improve your visual imagination. It is ultimately possible to create eyes-open hallucination at will given enough time and practice.