Ek Mukhi Rudraksha is an auspicious gift of nature to mankind. Eka mukhi rudraksha is the rarest amongst all mukhis. It is the king of all Rudraksha beads and is ruled by the pure consciousness or Paramshiva.
Lord Shiva is the part of trinity of Brahma, Vishnu and Mahesh and is associated with Moksha which is relief from cycle of death and birth. The most powerful 1 mukhi comes from Java/Indonesia.
Nepal ones are rarely found. Commonly available half-moon cashew shaped Eka Mukhi Rudraksha beads are not actually the Eka Mukhi Rudrakshas from Nepal but from Sri Lanka and South India.
Due to presence of one mukh and hence one seed and one compartment, the shape of the bead is that of an eye and is not round.
It governs the Sahasrara Chakra which governs clarity of mind, connection to God and spirit and your belief systems. Imbalance causes depression, obsession thinking, confusions and you may suffer from dizziness/migraines or brain/nervous disorders. Once balanced you get divine connection and manifest wealth.