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optics
optic
optic (op-tik) adj. concerned with the eye or vision.
o. atrophy degeneration of the optic nerve.
o. chiasm (
o. commissure) the X-shaped structure formed by the two optic nerves as nerve fibres from the nasal side of the retina of each eye cross over to join fibres from the lateral side of the retina of the opposite eye (see illustration).
o. disc (
o. papilla) the start of the optic nerve, where nerve fibres from the rods and cones leave the eyeball. See
blind spot.
o. nerve the second cranial nerve (II), which is responsible for vision. It passes into the skull behind the eyeball to reach the optic chiasm, after which the visual pathway continues to the occipital lobe.
o. neuritis see
retrobulbar neuritis.
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Atypical optic neuritis challenging to diagnose
Magazine article from: Ophthalmology Times; 8/1/2004; ; 700+ words
; Finding clues Atypical optic neuritis challenging to diagnose Red flags...short time frame Newark, NJ-Atypical optic neuritis raises red flags for ophthalmologists...can help differentiate it from typical optic neuritis. "When a patient presents with...
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Optic neuritis.(Opinion)
Newspaper article from: Manila Bulletin; 9/22/2009; 700+ words
; Optic neuritis is an inflammation of the optic nerve, the bundle of nerve fibers in your eye that transmits...brain. Pain and temporary vision loss are common symptoms of optic neuritis.Optic neuritis usually develops due to an autoimmune...
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Optic disc morphometry with optical coherence tomography: Comparison with planimetry of fundus photographs and influence of parapapillary atrophy and pigmentary conus.
Magazine article from: Indian Journal of Ophthalmology; 7/1/2005; ; 700+ words
; ...was to compare OCT measurements of the optic disc with those obtained by planimetry...mean [+ or -] SD). All eyes underwent optic disc assessment by OCT (fast optical disc...P < 0.001, P < 0.001). Optic discs with parapapillary atrophy (n...
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Optic nerve sheath meningioma: a case report.(Case Report)(Case study)
Magazine article from: Cases Journal; 12/29/2008; ; 700+ words
; ...examination revealed no atrophy or oedema of the optic disc and no lesion of the optic bulb. Thyroid related hormones were measured within...globe. The mass appeared as isointense to brain and optic nerve tissue on T1 weighted images (Fig. 1) and...
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Optic nerve features important in glaucoma assessment
Magazine article from: Ophthalmology Times; 10/15/2006; ; 700+ words
; ...Fundamental characteristics include neural rim, optic disc, scleral ring factors New York...magnitude if present), the sixe of the optic disc, the prominence of the scierai ring...peripapillary atrophy, the presence of optic disc hemorrhage, and clinically detectable...
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Optic nerve involvement in diabetes mellitus.(Original Article)
Magazine article from: Indian Journal of Ophthalmology; 7/1/1983; ; 700+ words
; ...in detail, very few reports deal with optic nerve involvement in this complex metabolic...the clinical diagnosis of diabetic optic neuritis/atrophy is always tentative to some extent. The incidence of optic nerve involvement in diabetes also varies...
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Optic neuritis.(Life Extension)
Newspaper article from: Manila Bulletin; 12/19/2007; 700+ words
; Byline: Dr. Gary S. Sy Optic neuritis is an inflammation of the optic nerve, the bundle of nerve fibers in your eye that...Pain and temporary vision loss are common symptoms of optic neuritis. Optic neuritis usually develops due to an...
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Optic nerve sheath advances detailed
Magazine article from: Ophthalmology Times; 11/15/2005; ; 700+ words
; ...made in the ability to diagnose and manage optic nerve sheath meningiomas. Neil R. Miller...School of Medicine, Baltimore. Primary optic nerve sheath meningioma is usually a unilateral...the presentation is anterior (anterior optic neuropathy) or in a retrobulbar fashion...
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Optic Disc Imaging by Heidelberg Retinal Tomogram in Congenital Optic Disc Anomaly.(Brief Report)(Case study)
Magazine article from: Indian Journal of Ophthalmology; 3/1/2004; ; 700+ words
; ...G. Sekhar We evaluated two cases of congenital optic disc anomaly with the Heidelberg Retinal Tomograph (HRT) that could be mistaken for glaucomatous optic disc. One was an optic disc coloboma with a visual field defect and the other...
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Optic nerve entrance coloboma associated with situs inversus.(Brief Report)
Magazine article from: Indian Journal of Ophthalmology; 10/1/2002; ; 700+ words
; ...Madhavaranga, Narendran. Nair A rare case of optic nerve entrance coloboma associated with situs...is reported. Coloboma involvement of the optic nerve generally takes one of two forms; (a) the optic nerve coloboma is associated with a retinochoroidal...
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Optic Atrophy
Encyclopedia entry from: Gale Encyclopedia of Medicine, 3rd ed.
Optic Atrophy Definition Optic atrophy can be defined as damage to the optic nerve resulting in a degeneration or destruction of the optic nerve. Optic atrophy may also be referred to as optic nerve head pallor because of the pale appearance of...
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Optic Neuritis
Encyclopedia entry from: Gale Encyclopedia of Medicine, 3rd ed.
Optic Neuritis Definition Optic neuritis is a vision disorder characterized by inflammation of the optic nerve. Description Optic neuritis occurs when the optic nerve, the pathway that transmits visual information to the brain, becomes inflamed...
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Fiber Optics
Encyclopedia entry from: Gale Encyclopedia of E-Commerce
...transpacific fiber optic cable into use. Advances in fiber optics continued into the...transatlantic fiber optic cable in 1990. Cable...percent stake in fiber optics vendor Teleport Communications...intent to lay a fiber optic cable connecting the...
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Optics
Encyclopedia entry from: Europe, 1450 to 1789: Encyclopedia of the Early Modern World
...OPTICS. The development of optics between 1450 and 1789 can be...dealing with pre-Keplerian optics, the second with the Keplerian...developments. PRE-KEPLERIAN OPTICS By 1450 two ostensibly contradictory...detailed account of how the optic complex contributes to vision...
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Manufacturing Business: Fiber Optic Automation, Inc.
Book article from: Business Plans Handbook
...Manufacturing Business BUSINESS PLAN FIBER OPTIC AUTOMATION, INC. 141 S. Main St. Boston...projections EXECUTIVE SUMMARY Overview Fiber Optic Automation, Inc. ("FOA" or the "Company...and Local Area Network (LAN) fiber optic markets. To date, the Company has raised...
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