Came across this tidbit of symbolism that definitely relates to the Blade Runner symbolism given how Deckard's unicorn dream is utilized as an awakening device at two levels:
[Update] Masonic scholar Manly Palmer Hall, in his 1928 book, The Secret Teachings of All Ages, cited the unicorn as mythical symbol of the awakened pineal gland:
Quote:The single horn of the unicorn may represent the pineal gland, or third eye, which is the spiritual cognition center in the brain. The unicorn was adopted by the Mysteries as a symbol of the illumined spiritual nature of the initiate. . . .