Upper Lid Retractors include?: (A) Muller muscle and superior rectus, (B) Levator palpabrae superioris and superior oblique, (C) Superior oblique and superior rectus, (D) Levator palpebrae superioris & muller muscle
Answer is D. *The levator palpebrae superioris is the impoant upper eye lid retractor. Injury or weakness to this muscle leads to ptosis. *Deep pa of the elevator muscle is the Muller's muscle, which is sympathetically innveed. Ref: Textbook of Ophthalmic reconstructive surgeries p.786