Fig. 1. Sagittal section of the lower eyelid. The anterior lamella consists of the skin and orbicularis muscle (o). The posterior lamella consists of the conjunctiva, capsulopalpebral fascia (CPF), inferior tarsal muscle (ITM), and tarsus (T). F, fornix; Te, Tenon's capsule; SO, septum orbitale; l, Lockwood's ligament; IO, inferior oblique muscle; CPH, capsulopalpebral head; IR, inferior rectus; OF, orbital fat. (From Hawes JJ, Dortzbach RK: The microscopic anatomy of the eyelid retractors. Arch Ophthalmol 100:1313, 1982.)