Enophthalmos is due to plasy of-: (A) Levator palpebrae superioris, (B) Superior tarsal muscle, (C) Orbitalis muscle, (D) Tenon's Capsule instability
Answer is D. *Tenon's capsule instability is a major cause of enophthalmos, as it forms all the major ligament of the orbit which suppo the globe in the orbit. Ref: Duane's Clinical ophthalmology, vol.2, chapter 48, p.5