Results 251 to 260 of about 1,830,086 (308)
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Seminars in Ophthalmology, 2003
Optic disc drusen are congenital and developmental anomalies of the optic nerve head seen commonly in clinical practice, often as an incidental ophthalmologic finding during routine exams. Optic disc drusen are a form of calcific degeneration in some of the axons of the optic nerve.
Patricia L, Davis, Walter M, Jay
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Optic disc drusen are congenital and developmental anomalies of the optic nerve head seen commonly in clinical practice, often as an incidental ophthalmologic finding during routine exams. Optic disc drusen are a form of calcific degeneration in some of the axons of the optic nerve.
Patricia L, Davis, Walter M, Jay
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Medulloepithelioma of the Optic Nerve Head
Archives of Ophthalmology, 1997Medulloepithelioma of the optic nerve is a rare developmental tumor. We describe a 2-year-old boy with profound loss of vision associated with a visible tumor of the optic nerve head in his left eye. A clinically diagnosed retinoblastoma necessitated left eye enucleation.
M, O'Keefe +4 more
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Biomechanics of the optic nerve head
Experimental Eye Research, 2009Biomechanical factors acting at the level of the lamina cribrosa (LC) are postulated to play a role in retinal ganglion cell dysfunction and loss in glaucoma. In support of this postulate, we now know that a number of cell types (including lamina cribrosa cells) are mechanosensitive.
Ian A, Sigal, C Ross, Ethier
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Optometry and Vision Science, 2000
ABSTRACT: Background The normal optic nerve head varies from one person to another, and there is often intraindividual variation as well. Factors such as race and age play an important role in distinguishing what may be considered normal variations in optic nerve head appearance.
N M, Sing, S F, Anderson, J C, Townsend
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ABSTRACT: Background The normal optic nerve head varies from one person to another, and there is often intraindividual variation as well. Factors such as race and age play an important role in distinguishing what may be considered normal variations in optic nerve head appearance.
N M, Sing, S F, Anderson, J C, Townsend
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Tumors of the optic nerve head
Survey of Ophthalmology, 1985A variety of primary and secondary tumors can involve the optic nerve head. Examples of primary optic disc tumors include capillary, cavernous and racemose hemangiomas, astrocytomas, and melanocytomas. Secondary optic disc tumors include metastatic carcinoma, leukemia, and those which invade the nerve head from adjacent structures (choroidal melanoma ...
G C, Brown, J A, Shields
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Survey of Ophthalmology, 2019
A 68-year-old woman with a recent history of blurring in the left eye had undergone mastectomy for breast cancer 20 years ago. A series of bone metastases started 5 years after her diagnosis. Examination of the optic nerve head of the left eye revealed an isolated peripapillary mass.
Rohan Verma +4 more
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A 68-year-old woman with a recent history of blurring in the left eye had undergone mastectomy for breast cancer 20 years ago. A series of bone metastases started 5 years after her diagnosis. Examination of the optic nerve head of the left eye revealed an isolated peripapillary mass.
Rohan Verma +4 more
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Astrocytoma of the Optic Nerve Head
Archives of Ophthalmology, 1965Astrocytomas are among the rarest of the neoplasms which occur within the eye. Except those intraocular tumors which have occurred in association with neurofibromatosis or with tuberous sclerosis, and those optic nerve gliomas which have invaded the optic papilla, there are apparently only four reported cases1,3,10,12in which previous reporters1,8 ...
R Y, FOOS, B R, STRAATSMA, R A, ALLEN
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Ultrastructure of the Optic Nerve Head
Archives of Ophthalmology, 1970Astrocyte cell bodies and processes form a continuous limiting membrane of varying thickness over the optic disk surface. The surface contour is irregular in places. Basement membrane separates glia from vitreous. The layer of glia is continuous with the internal limiting membrane of the retina, which is similar but has a thicker basement membrane and ...
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The optic nerve head in acquired optic neuropathies
Nature Reviews Neurology, 2010Acquired optic neuropathies are a common cause of blindness in adults, and are associated with characteristic morphological changes at the optic nerve head. Accurate and prompt clinical diagnosis, supplemented with imaging where appropriate, is essential to optimize management of the optic neuropathy and to counsel the patient appropriately on its ...
Evelyn C, O'Neill +6 more
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The Optic Nerve Head in Glaucomatous Optic Neuropathy
Archives of Ophthalmology, 1997Primary open-angle glaucoma, the most common form of glaucoma, is characterized by irreversible loss of axons from the optic nerve. Previous research in humans and monkeys with glaucoma suggests that the site of damage to the axons is at the level of the lamina cribrosa in the optic nerve head.
M R, Hernandez, J D, Pena
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