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Topic: Visual loss

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Andrea Bocelli

	eMedicine - Sudden Visual Loss : Article by Gino A Farina, MD (Site not responding. Last check: 2007-10-09)
		In physiologic visual loss, this results in doubling of the size of the central visual field, whereas in hysterical visual loss, the visual field remains the same.
		The visual consequences of postpapilledema optic atrophy start with peripheral visual field constriction, typically most prominent in the inferior nasal or upper nasal quadrant, followed by loss of central visual field with decline in central acuity and dyschromatopsia.
		Visual complaints vary from mild or moderate blurring of vision, which may be transient.
	www.emedicine.com /NEURO/topic480.htm (4459 words)

	Visual Field Impairment
		The visual images that we see to the right side travel from both eyes to the left side of the brain, while the visual images we see to the left side in each eye travels to the right side of the brain.
		While homonymous hemianopsia is a physical loss of visual field to one side, visual neglect is an attentional problem to one side of their body.
		Visual neglect is a spatial inattention to one side caused most commonly by damage to the parietal lobe of the brain.
	www.eyeassociates.com /images/visual_field_impairment.htm (1700 words)

	Visual 1995
		Visual loss in glaucoma is not generally reversible, although some improvement in the field of vision may occur in the first 6 months of topical treatment.[61] Treatment is aimed at reducing IOP with the use of topical agents (e.g., pilocarpine or alpha-adrenergic blockers [e.g., timolol and betaxolol]), systemic agents (e.g., acetazolamide) or surgery.
		Underreporting of visual impairment is common in the elderly population.
		Visual impairment due to presbyopia and other refractive errors is common in elderly people, and its prevalence increases with age.
	www.ctfphc.org /Full_Text/Visual_1995.htm (6340 words)

	Common Causes of Vision Loss in Elderly Patients - July 1999 - American Academy of Family Physicians
		Loss of vision among the elderly is a major health care problem: approximately one in three elderly persons has some form of vision-reducing eye disease by the age of 65.
		Loss of vision is the result of progressive geographic atrophy or, more commonly, the development of exudative macular degeneration.
		Because primary open-angle glaucoma is associated with early peripheral visual field loss and affects central vision late in the disease process, the American Academy of Ophthalmology recommends that the elderly have comprehensive eye examinations every one to two years.
	www.aafp.org /afp/990700ap/99.html (3711 words)

	Visual Field Loss: Rehabilitative Strategies (Site not responding. Last check: 2007-10-09)
		Visual field loss may occur in many forms from nearly complete loss of peripheral vision to small areas of partial loss.
		Hemianopsias (loss of half the field) or quadranopsia (loss of quarter field) are common after head injury or tumors.
		The functional rehabilitation of the visual field loss may require a combination of scanning therapy, adaptive strategies and optical field awareness devices.
	www.nora.cc /patient_area/visual_field_loss.html (203 words)

	Incidence of visual loss in rural southwest Uganda -- Mbulaiteye et al. 87 (7): 829 -- British Journal of Ophthalmology
		Incidence of visual loss in rural southwest Uganda
		visual loss in a rural population in southwest Uganda.
		the incidence of visual loss in this population.
	bjo.bmj.com /cgi/content/full/87/7/829 (3329 words)

	Visual Standards - Aspects and Ranges of Vision Loss - Resolution Adopted by the ICO, April 20, 2002 (Site not responding. Last check: 2007-10-09)
		Visual Impairment – to be used when the condition of vision loss is characterized by a loss of visual functions (such as visual acuity, visual field, etc.) at the organ level.
		Vision Loss – to be used as a general term, including both total loss (Blindness) and partial loss (Low Vision), charaterized either on the basis of visual impairment or by a loss of functional vision.
		The report shows that there is a reasonable correlation between these two aspects; yet it is important to be clear about the basis upon which classifications are made, e.g., based on visual acuity (a visual function) or based on reading ability (functional vision).
	www.icoph.org /standards/visionres.html (1256 words)

	eMedicine - Sudden Visual Loss : Article by Gino A Farina, MD (Site not responding. Last check: 2007-10-09)
		Papilledema/neoplasm causes visual loss by mechanically compressing or physiologically destroying the optic nerve.
		Patients with hysterical blindness or loss of vision, despite alleged loss of vision, are still capable of maneuvering in a room.
		If the patient indicates a unilateral loss of vision, examination should be conducted in such a way that the patient does not know which eye is being tested or the actual size of the optotypes.
	www.emedicine.com /oph/topic271.htm (3613 words)

	Recent advances in cortical visual impairment (Site not responding. Last check: 2007-10-09)
		Visual acuity is a measure of the ability to visually resolve objects of interest in detail.
		Visual improvement may be rapid, particularly in cases of traumatic injury, however, usually visual recovery is gradual.
		Central to the diagnosis of CVI is loss of visual acuity.
	www.aph.org /cvi/articles/good_1.html (4042 words)

	Psychogenic medicine: Non-organic visual loss -- Beatty 75 (882): 201 -- Postgraduate Medical Journal
		Visual complaints without a physical basis are not uncommon presentations to the general physician, the neurologist, or the
		Non-organic loss of visual field usually occurs in association with an alleged reduction in visual acuity.
		A diagnosis of non-organic visual loss is not an indication
	pmj.bmj.com /cgi/content/full/75/882/201 (3775 words)

	Degree, duration, and causes of visual loss in uveitis -- Durrani et al. 88 (9): 1159 -- British Journal of ...
		Degree, duration, and causes of visual loss in uveitis -- Durrani et al.
		Degree, duration, and causes of visual loss in uveitis
		and prevalence of visual loss and blindness from uveitis.
	bjo.bmjjournals.com /cgi/content/full/88/9/1159 (3161 words)

	Visual-field loss caused by sinusitis: a case report - Original Article Ear, Nose & Throat Journal - Find Articles (Site not responding. Last check: 2007-10-09)
		The author reports a case of visual-field loss that was not characterized by any direct compression or external signs of sinus disease.
		His visual acuity was 6/6 right and 6/5 left, he had no relative afferent pupillary defect, and his ocular movements were normal.
		The relationship between surgical intervention and the rapid recovery is highly suggestive that the patient's sinusitis was the cause of his visual-field loss.
	www.findarticles.com /p/articles/mi_m0BUM/is_1_82/ai_97754561 (723 words)

	Pupil perimetry in the diagnosis of functional visual field loss -- Rajan et al. 95 (10): 498 -- Journal of the Royal ...
		Pupil perimetry in the diagnosis of functional visual field loss -- Rajan et al.
		loss led to reinvestigation of diabetes insipidus and to an
		in whom the visual loss is thought to be functional.
	www.jrsm.org /cgi/content/full/95/10/498 (903 words)

	Arch Neurol -- Abstract: Visual loss in pseudotumor cerebri. Incidence and defects related to visual field strategy, ...
		Arch Neurol -- Abstract: Visual loss in pseudotumor cerebri.
		Visual field examinations were performed serially on 20 patients with
		Visual loss was found in 75% of eyes using the manual strategy and in 77.5%
	archneur.ama-assn.org /cgi/content/abstract/44/2/170 (152 words)

	Management of Visual Field Loss
		There is an increased number of patients with visual impairment, secondary to visual field loss alone or in conjunction with decreased visual acuity.
		While a person with a visual field loss may have near normal visual acuity, the visual field loss may make walking in a crowd difficult because the ground cannot be seen.
		A visual field loss may also make reading difficult because the beginning or end of a sentence cannot be seen.
	www.viewfinderlowvision.com /management.html (217 words)

	Visual Loss in Pregnant Women with Pituitary Adenomas -- Kupersmith et al. 121 (7): 473 -- Annals of Internal Medicine
		loss occurred in 6 of 8 primiparous patients, all with adenomas
		visual loss during pregnancy as a result of tumor expansion.
		Visual fields measured by tangent perimetry of patients 1 to 6 are listed (top to bottom) at the time that visual loss occurred during pregnancy.
	www.annals.org /cgi/content/full/121/7/473 (2656 words)

	functional visual loss - Student Doctor Network Forums
		Of the "trick" tests to detect "functional" visual loss, the most reliable is the finding of "tunnel vision" that is fixed regardless of the patient distance from the tangent screen.
		It is important to remember that "functional" visual loss is a diagnosis of exclusion, and you must be sure that you have excluded an organic lesion of the visual system.
		Also remember that the visual system has two pathways: one (cortical visual) bypasses the brainstem and the other (the phylogenetically older reflexive pathway) can function independent of the cortex.
	forums.studentdoctor.net /showthread.php?p=4359263#post4359263 (845 words)

	JEFF MANN'S EM GUIDEMAPS — LOSS OF VISION
		Visual pathway pathology, bilateral optic neuritis, bilateral ischemic optic neuropathy (cerebral arteritis), toxic optic neuropathy
		(* a traumatic optic neuropathy is a clinical diagnosis that is typically made when sudden visual loss is temporally related to blunt or penetrating head or face trauma; and a diagnosis of traumatic optic neuropathy should not readily be made in the absence of an afferent pupillary defect on the side of the presumed injury)
		- the visual acuity should be tested using a formal chart at 20 feet and recorded as the lowest line the patient can correctly read more than half the letters (the number of unread letters should be recorded as well eg.
	www.jeffmann.net /NeuroGuidemaps/vision.htm (6202 words)

	Traumatic Brain Injury Related Visual Loss
		TBI related vision loss encompasses conditions other than traumatic cranial neuropathy and injury to the afferent visual pathway.
		Patients with decreased visual acuity, visual field loss and ocular misalignment, with or without double vision, are best first evaluated by a neuro-ophthalmologist or an ophthalmologist skilled in assessing neurologically injured patients.
		Aside from visual disorders, TBI patients have multiple problems that can best be addressed by specialists in the field of rehabilitation medicine, psychiatry, psychology, counseling, special education, neurology and neurological surgery.
	www.drlegge.com /bulletin.html (1063 words)

	Visual loss : Medical Symptom Description - WrongDiagnosis.com
		Visual loss: Visual loss is listed as an alternate name or description for symptom Vision loss.
		For a medical symptom description of 'Visual loss', the following symptom information may be relevant to the symptoms: Vision loss (symptom).
		However, note that other causes of the symptom 'Visual loss' may be possible.
	www.wrongdiagnosis.com /symptom/visual-loss.htm (208 words)

	Electrophysiological evaluation of visual loss in Muller cell sheen dystrophy -- Kellner et al. 82 (6): 650 -- British ...
		Electrophysiological evaluation of visual loss in Muller cell sheen dystrophy -- Kellner et al.
		A 61 year old woman presented with visual loss in the right eye.
		loss of visual function was noted 1 year later in the right eye,
	bjo.bmj.com /cgi/content/abstract/82/6/650 (434 words)

	An Unusual Cause of Visual Loss: Involvement of Bilateral Lateral Geniculate Bodies -- Lefèbvre et al. 25 (9): ...
		cause of visual disturbance is seldom reported in the literature.
		Visual field defects in vascular lesions of the lateral geniculate body.
		Congruous and incongruous sectorial visual field defects with lesions of the lateral geniculate nucleus.
	www.ajnr.org /cgi/content/full/25/9/1544 (2326 words)

	MedlinePlus Medical Encyclopedia: Vision problems
		Blurred vision is the loss of sharpness of vision and the inability to see small details.
		For the most severe form of visual loss, see blindness.
		Retinal detachment -- symptoms include floaters, flashes of light across your visual field, or a sensation of a shade or curtain hanging on one side of your visual field.
	www.nlm.nih.gov /medlineplus/ency/article/003029.htm (1203 words)

	Gottlieb Vision Group
		When the visual field loss, because of the neurological cause, is equal in the right and left eyes, this is known as a homonymous hemianopsia.
		Sometimes the loss is absolute and this is usually associated with visual “neglect.” When the visual loss is relative verses absolute, the patient can also have visual “neglect,” however usually to a lesser degree.
		In cases of visual loss from trauma with constricted visual fields, as is also seen in retinitis pigmentosa and glaucoma; multiple prisms are mounted laterally on each lens.
	www.gottliebvisiongroup.com /visual_field_awareness_system.htm (1913 words)

	[No title]
		Some of the symptoms can also give you a clue of where it is coming from: Visual Sensory Pathways symptoms: patient complains of dim vision, visual loss, field loss, &/or blurred vision Motor Pathway symptoms: diplopia (double vision) Sudden loss of vision typically is d/t a vascular problem (ex.
		Visual Pathway: Anterior pathway- unilateral A junctional scotoma occurs when you have a lesion on the optic nerve affecting the nasal fibers that cross to the opposite side.
		Chiasm- bilateral and heteronymous heteronymous- affecting opposite visual fields (ex: the temporal fields of both eyes) Posterior pathway- bilateral and homonymous Ex: you can have a small scotoma at the posterior portion of the visual cortex where the macular fibers are very dense and bunch up and this can cause dense central deficits.
	www.gwu.edu /~med08/worksheets/Visual.doc (1242 words)

	The Ohio Rehabilitation Services Commission (RSC)
		However, a person with a visual impairment is not always totally blind.
		Many people with visual impairments can read large print and even drive a car.
		Glaucoma - This is a pattern of optic nerve damage and visual loss caused by a number of eye diseases.
	www.rsc.ohio.gov /FunforKids/learn/visual_imp.asp (579 words)

	Vision Loss
		Roughly 1.8 million Americans have vision loss from advanced macular degeneration, and another 6 million are at risk because they have intermediate stage disease, according to the National Eye Institute.
		The wet form is caused by a proliferation of new blood vessels that grow into the macula, as the body tries to heal the damage from the drusen.
		When these vessels leak - a process that can happen overnight - the result can be a total loss of central vision, in other words, a blind spot in the middle of the visual field that can render a person legally blind.
	www.myhealthsense.com /F020226_visionloss.html (1755 words)

	Case series: Monocular visual loss associated with subarachnoid hemorrhage secondary to ruptured intracranial ...
		Case series: Monocular visual loss associated with subarachnoid hemorrhage secondary to ruptured intracranial aneurysms: [Perte visuelle monoculaire associee a une hemorragie sous-arachnoidienne secondaire a la rupture d'anevrysmes intracraniens] -- Chong et al.
		Case series: Monocular visual loss associated with subarachnoid hemorrhage secondary to ruptured intracranial aneurysms
		sustained visual loss subsequent to surgical dissection and
	www.cja-jca.org /cgi/content/abstract/53/7/684 (256 words)

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