In vertebrate anatomy, the orbit is the cavity or socket/hole of the skull in which the eye and its appendages are situated. "Orbit" can refer to the bony socket, or it can also be used to imply the contents. In the adult human, the volume of the orbit is about 28 millilitres (0.99 imp fl oz; 0.95 US fl oz), of which the eye occupies 6.5 ml (0.23 imp fl oz; 0.22 US fl oz). The orbital contents comprise the eye, the orbital and retrobulbar fascia, extraocular muscles, cranial nerves II, III, IV, V, and VI, blood vessels, fat, the lacrimal gland with its sac and duct, the eyelids, medial and lateral palpebral ligaments, cheek ligaments, the suspensory ligament, septum, ciliary ganglion and short ciliary nerves.
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Eye sockets in the context of Enophthalmia
In medicine, enophthalmia describes eyes that are abnormally sunken into their sockets. This condition usually affects elderly persons. Surgery can be done to correct it. Bilateral progressive enophthalmos may be the presenting sign of metastatic breast carcinoma, even when local symptoms in the breast are absent.