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Optic Neuritis and Ganglion Cell Layer

2016-08-12 08:53:21 | BioPortfolio

Summary

BACKGROUND AND OBJECTIVES: The recent expansion of the applications of optical coherence tomography (OCT) demonstrated a higher correlation between the analysis of ganglion cells and visual function, in comparison with the analysis of the nerve fiber layer for several diseases of the optic nerve. Atrophy of the ganglion cells tends to induce the visual function deficits. In the case of optic neuritis, inflammation of the optic nerve causes a deficit of visual function initially with low vision, color blindness and visual field. Secondary atrophy of ganglion cell can result. The purpose of the study is to evaluate the correlation between the analysis of ganglion cells at the time of diagnosis of optic neuritis and the resulting visual acuity at 6 months and visual function (visual acuity, color vision and perimetry) 1 year regardless of treatment. A predictive effect could help predict the patient's clinical course and management of uncertainty and anxiety. MATERIALS AND METHODS: An assessment at diagnosis and follow-ups at 6 months and 1 year with a measurement of best corrected visual acuity, a test color vision HRR (Hardy-Rand-Rittler), an OCT with analysis of ganglion cells and perimetry Humphrey 30 -2 fast will be done. Simple linear and logistic regressions will be used. RESULTS: We expect that there will be a significant association between atrophy of ganglion cells in the diagnosis and residual visual function after an episode of optic neuritis. We believe that the initial atrophy is associated with poorer visual prognosis. CONCLUSION: A predictive effect could help to inform the patient about the evolution of the disease and provide early visual rehabilitation.

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Conditions

Optic Neuritis

Location

Hopital Saint-Sacrement
Quebec
Canada
G1S 4L8

Status

Recruiting

Source

Laval University

Results (where available)

View Results

Links

Published on BioPortfolio: 2016-08-12T08:53:21-0400

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Medical and Biotech [MESH] Definitions

Inflammation of the optic nerve. Commonly associated conditions include autoimmune disorders such as MULTIPLE SCLEROSIS, infections, and granulomatous diseases. Clinical features include retro-orbital pain that is aggravated by eye movement, loss of color vision, and contrast sensitivity that may progress to severe visual loss, an afferent pupillary defect (Marcus-Gunn pupil), and in some instances optic disc hyperemia and swelling. Inflammation may occur in the portion of the nerve within the globe (neuropapillitis or anterior optic neuritis) or the portion behind the globe (retrobulbar neuritis or posterior optic neuritis).

A syndrome characterized by acute OPTIC NEURITIS in combination with acute MYELITIS, TRANSVERSE. Demyelinating and/or necrotizing lesions form in one or both optic nerves and in the spinal cord. The onset of optic neuritis and myelitis may be simultaneous or separated by several months. (J Neurol Neurosurg Psychiatry 1996 Apr;60(4):382-387)

Atrophy of the optic disk which may be congenital or acquired. This condition indicates a deficiency in the number of nerve fibers which arise in the RETINA and converge to form the OPTIC DISK; OPTIC NERVE; OPTIC CHIASM; and optic tracts. GLAUCOMA; ISCHEMIA; inflammation, a chronic elevation of intracranial pressure, toxins, optic nerve compression, and inherited conditions (see OPTIC ATROPHIES, HEREDITARY) are relatively common causes of this condition.

An extract of absinthium and other bitter herbs, containing 60% alcohol. Prolonged ingestion causes nervousness, convulsions, trismus, amblyopia, optic neuritis, and mental deterioration. (Dorland, 27th ed)

The most common clinical variant of MULTIPLE SCLEROSIS, characterized by recurrent acute exacerbations of neurologic dysfunction followed by partial or complete recovery. Common clinical manifestations include loss of visual (see OPTIC NEURITIS), motor, sensory, or bladder function. Acute episodes of demyelination may occur at any site in the central nervous system, and commonly involve the optic nerves, spinal cord, brain stem, and cerebellum. (Adams et al., Principles of Neurology, 6th ed, pp903-914)

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