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Topic: Scotoma

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Macula

Jay Ward

Ontario

	Reference.com/Encyclopedia/Scotoma
		A scotoma (Greek: darkness; plural: "scotomas" or "scotomata") is an area or island of loss or impairment of visual acuity surrounded by a field of normal or relatively well-preserved vision.
		Even a small scotoma that happens to affect central or macular vision will produce a severe visual handicap, whereas a large scotoma in the more peripheral part of a visual field may go unnoticed by the bearer due to the normal reduced visual resolution in the peripheral visual field.
		Scintillating scotoma is a common visual aura in migraine.
	www.reference.com /browse/wiki/Scotoma (420 words)

	Scotoma
		Medically, a scotoma is an area or island of loss or impairment of visual acuity surrounded by a field of normal or relatively well-preserved vision.
		Symptom-producing or pathological scotomae may be due to a wide range of disease processes, affecting either the retina (in particular its most sensitive portion, the macula) or the optic nerve itself.
		Common causes of scotoma include demyelinating disease such as multiple sclerosis (retrobulbar neuritis), toxic substances such as methyl alcohol and quinine, nutritional deficiencies, and vascular blockages either in the retina or in the optic nerve.
	www.mrsci.com /Opthamology/Scotoma.php (330 words)

	MoonDragon's Health & Wellness: Eye Disorders & Problems: Scotoma
		Unless a scotoma is large or is located in the center of the field of vision, it may not be noticed.
		The well-described scintillating scotoma is not the most common of visual auras, as shown by a recent retrospective study by Queiroz and Coworkers (1996).
		Scotomas are considered a symptom of disease, not a disease in themselves and are not considered treatable.
	www.moondragon.org /health/disorders/eyesscotoma.html (797 words)

	Dorlands Medical Dictionary (Site not responding. Last check: 2007-10-13)
		a scotoma arising at or near the blind spot and arching inferiorly or superiorly toward the nasal field, following the paths of the retinal nerve fibers.
		a scotoma appearing as a blank spot in the visual field; the patient is unaware of it, and it is detected only by examination.
		a scotoma subjectively perceived as a fl spot in the visual field, and of which the patient is aware.
	www.mercksource.com /pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_s_06zPzhtm (3712 words)

	Spiritual Scotoma
		This is the same a when your wife comes home to see the garage a mess and it shocks her, though you may be used to it.
		Scotomas may be central, if caused by macular or optic nerve disease, or peripheral if the result of chorioretinal lesions or retinal holes.
		Scotoma of the heart, then, is an attempt by the flesh at trying to dominate the new man with old principles of sin.
	www.apuritansmind.com /ChristianWalk/McMahonSpiritualScotoma.htm (4151 words)

	Scotoma : RPResearch
		IMPLICATION: Eccentric viewing may be a symptomatic and spontaneous adjustment to a central scotoma.
		A patient with a central scotoma naturally chooses (unconsciously) a preferred eccentric area of the retina to perform tasks (eg reading).
		A blind spot (scotoma) is a small area in the visual field where sight does not function.
	www.rpresearch.ca /?Top=Scotoma (173 words)

	Visual Loss - Migraine Aura
		The term scintillating scotoma refers to the pulsating movements of the hallucinatory patterns appearing on the border regions of a negative or positive scotoma.
		Thus, a scintillating scotoma either combines the features of a negative and a positive scotoma, qualifying as the latter because of the hallucinatory patterns at its margins, or it displays in its entirety the features of a positive scotoma.
		An asthenopic scotoma is a scotoma with an asthenopic mode of presentation, characterized by an abnormal fatiguability of visual function and manifesting itself as the disappearance of part or whole of a visual target after a latent time.
	www.migraine-aura.org /EN/Visual_Loss.html (1948 words)

	ISLRR - Vision 2002 - Abstracts (Site not responding. Last check: 2007-10-13)
		All telescopes caused an optical ring scotoma in the monocular field with an outer diameter equivalent to the visible field diameter multiplied by the magnification.
		In the binocular field there was usually only a small scotoma, where the physiological scotoma of the other eye overlapped the ring scotoma.
		That scotoma plus the telescopic scotomata may overlap a user's central scotoma(ta) in the other eye to create a binocular scotoma.
	www.islrr.org /Vision02/72.html (289 words)

	www.myspace.com/scotoma
		Right before the line up was complete the name changed to Scotoma and Deano J. Symeonides entered the band as a lead and rhythm guitar player.
		Scotoma has been described as an amazing live band, with tons of energy and aggression pouring out of every single note and scream.
		By the arrival of our fourth demo CD (Desert Fish) in 1997, and after four years of being together as a band, we decided to turn our attention towards finding a record label that could help us be known to another part of the world.
	www.myspace.com /scotoma (1439 words)

	The evaluation of visual function in the presence of a central scotoma (Site not responding. Last check: 2007-10-13)
		In the case of a central scotoma, you can expect a change in the fixation associated with the fovea (the macular area) and ultimately, it is the eccentric fixation that determines the remaining visual function.
		Since central scotoma, particularly in an advanced stage, results in fixation difficulties in visual field examination, it often makes the edges of the scotoma difficult to determine.
		In addition, different fixation indicators were used to check if and, in that case, to what degree these can assist the person suffering from central scotoma in obtaining a central fixation of the fovea during measurement.
	www.certec.lth.se /doc/evaluationofvisual (268 words)

	central scotoma - General Practice Notebook (Site not responding. Last check: 2007-10-13)
		Central scotoma is an area of depressed vision that corresponds with the point of fixation and interferes with central vision.
		The information provided herein should not be used for diagnosis or treatment of any medical condition.
		Oxbridge Solutions Ltd® is an independent company owned by the authors which does not receive income from any other organisation or individual.
	www.gpnotebook.co.uk /cache/2100625411.htm (157 words)

	Magnification Scotoma (Site not responding. Last check: 2007-10-13)
		The scotoma can also be enlarged by a poor design of the telescope oculars or the device(s) on which they are suspended in the field of vision.
		In general, flip-up telescopes have greater potential for producing a larger scotoma than through-the-lens systems.
		The greatest distress related to the magnification scotoma is related to the risk of poor control of instruments being moved into (or out of) the magnified field of view.
	www.dentistry.ubc.ca /research/ergonomics/scotoma1.htm (241 words)

	Optokinetic Nystagmus Elicited by Filling-in in Adults with Central Scotoma -- Valmaggia and Gottlob 43 (6): 1804 -- ... (Site not responding. Last check: 2007-10-13)
		with large central scotomas were included in the study.
		or filled in the scotoma and perceived the stripes.
		positive scotomas suggests that an active process is more likely.
	www.iovs.org /cgi/content/abstract/43/6/1804 (344 words)

	Dunlop Art Gallery: What's On: Taras Polataiko: Scotoma (Site not responding. Last check: 2007-10-13)
		Other Associated Events: Reception and Performance: The Artist is in Attendance: Saturday, November 21 at 8:30 pm.
		In Scotoma (the world means a gap or dark area in the field of vision), he invokes ideas of vision, blindness, fear of the invisible and surveillance.
		Comprised of fourteen life-size trompe l'oeil self portraits, Scotoma is strategically set within an altered architectural space.
	www.dunlopartgallery.org /whatson/page.cgi?key=42 (149 words)

	flittering scotoma - OneLook Dictionary Search
		We found 6 dictionaries with English definitions that include the word flittering scotoma:
		Tip: Click on the first link on a line below to go directly to a page where "flittering scotoma" is defined.
		Flittering scotoma : Biological Sciences Dictionary [home, info]
	www.onelook.com /?loc=rescb&w=flittering+scotoma (119 words)

	Products
		Instead of showing an image with a static scotoma (blind spot), the MD Simulator is a Windows
		software tool that couples the scotoma to the mouse position to simulate that with eye movement the area of worst vision also moves.
		Try yourself to read some text while simulating MD!
	www.opticaldiagnostics.com /products (194 words)

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