extraocular muscle


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extraocular muscle

(ĕk′strə-ŏk′yə-lər)
n.
Any of the six small muscles that control movement of the eyeball within the socket.

extraocular muscle

Abbreviation: EOM
Six muscles that attach outside the eyeball and that move the eye in its socket. The EOM are: the inferior and superior oblique muscles, and the lateral, medial, inferior, and superior rectus muscles.
See: extraocular for illus.
See also: muscle
References in periodicals archive ?
Orbital decompression does not solve the problem of pre-operative diplopia, and a relevant rate of patients will need a subsequent extraocular muscle correction surgery.
The extraocular muscles are innervated by the ocular motoneurons which lie in the brainstem nuclei of the third, fourth and sixth cranial nerves.
We could not find any case of extraocular muscle paralysis related to snake bite among our national publications related to snake bite.
Because the eyelids remain intact and the process does not reach the deep orbital and perioptic-nerve connective tissues, visual acuity may not be affected and ocular motility is generally well preserved unless the extraocular muscles are involved.
Enlargement and fibrosis of the extraocular muscles leads to restricted eye movements.
Graves ophthalmopathy is an autoimmune disease in which the volume of both the extraocular muscles and retro-orbital connective tissues is increased.
The orientation of a globe may be determined by identifying extraocular muscle insertions, optic nerve, and other landmarks as illustrated in Figure 1.
Owing to the findings of mild ptosis, proptosis, swelling, small esotropia, and reduced visual fields threshold in the right eye, the patient was referred to the HES on a 'soon' basis (to be seen within four weeks), via her GP, suspecting thyroid problems affecting the extraocular muscles or a lacrimal gland problem.
Roy, an ophthalmologist in private practice who specializes in cataract surgery, provides students, research fellows, optometrists, ophthalmologists, and eye care practitioners with a guide listing the differential diagnosis of specific ocular diseases, organized by anatomic organ--the orbit, lids, lacrimal system, extraocular muscles, conjunctiva, globe, sclera, cornea, anterior chamber, pupil, iris, lens, vitreous, retina, choroid, and optic nerve--in addition to visual field defects and intraocular pressure and ending with a section on general signs and symptoms such as visual disturbance or complaint and head position.
Cranial osteopathy focused on the sphenobasilar joint and the most likely places for intracranial entrapment neuropathy of oculomotor, trochlearis, and abducens nerves, which regulate intra- and extraocular muscles.
Strabismus Surgery for Children and Adults - Surgery on the extraocular muscles to correct crossing or wandering eyes