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November 24, 2009
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Visual Field Test

Medical Author: John Sheppard, MD
Medical Editor: William C. Shiel Jr., MD, FACP, FACR

What is a visual field test?

A visual field test is a method of measuring an individual's entire scope of vision, that is their central and peripheral (side) vision. Visual field testing actually maps the visual fields of each eye individually. The visual field test is a subjective examination, requiring the patient to understand the testing instructions, fully cooperate, and complete the entire test in order to provide useful information.



Next: What is a visual field test used for? »

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Visual Field Test

What is Devic's Syndrome?

Devic's syndrome is a rare autoimmune central nervous system disorder characterized by transverse myelitis (in which the fatty, protective covering of the spinal cord breaks down) and optic neuritis (in which inflammation of the optic nerve causes loss of vision and eye pain).]. It is considered a special form of multiple sclerosis (MS) with a severe and rapid course. The disorder affects the optic nerve and the nerves in the spinal cord. In Devic's syndrome, the fatty sheath that protects these nerves is lost. Individuals may experience vision impairment and various degrees of paralysis, as well as incontinence. The disorder is closely linked with MS and lupus, but usually appears before any symptoms of MS are noted. If an isolated disease episode affecting the spinal cord and optic nerve occurs after an infection or common cold, it is considered a post-infectious acute demyelinated encephalomyelitis (ADE) rather...

Read the Devic's Syndrome article »










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