Enophthalmos is due to plasy of-
*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
Levator palpebrae superioris
Superior tarsal muscle
Orbitalis muscle
Tenon's Capsule instability
Diseases of orbit, Lids and lacrimal apparatus