The Effects of Retro Bull Bar Blocks on the Face

The facial nerve has multiple branches that go to the face. A retro bull bar block it anesthetizes the three cranial nerves responsible for movement of the eye. The ciliary ganglion provides anesthesia to the conjunctiva cornea and uvia Branches of the facial nerve are not blocked by the retro Bull Bar block But are often separately blocked to produce a canesus of the eyelids. So sometimes they'll do a separate facial nerve block so you don't get that eyelid movement.