Enophthalmus is due to palsy of: (A) Levator palpebrae superioris, (B) Superior tarsal muscle, (C) Orbital muscle, (D) Inferior tarsal muscle
Answer is C. Ref: BD Chaurasia's HUMAN ANATOMY, Volume 3, 4th edition. Enophthalmos (i.e. retraction of the eyeball); is possibly caused by paralysis of the smooth (orbitalis) muscle in the floor of the orbit.