Evaluation of retinal nerve fiber layer thickness measured by optical coherence tomography in Moroccan patients with multiple sclerosis.
Journal Français d'Ophtalmologie(2015)
Abstract
Multiple sclerosis (MS) is a chronic inflammatory disease of the central nervous system characterized by focal inflammatory infiltrates, demyelinating lesions and axonal injury. The purpose of the study was to evaluate the retinal nerve fiber layer (RNFL) thickness by optical coherence tomography (OCT) in Moroccan patients with MS and to assess the relationship between RNFL thickness and disease duration, Expanded Disability Status Scale (EDSS) score, visual acuity and automated visual field indices.Thirty-one patients with definite MS and thirty-one disease-free controls were enrolled in the study. After neurologic consultation, ophthalmologic examination including visual acuity, automated visual field testing and OCT were performed.Significant differences between both groups were observed in OCT parameters (total, temporal and macular ganglion cell layer) with lower thickness in the MS group. In patients without a history of optic neuritis, there were statistically significant inverse correlations between total RNFL thickness and disease duration, neurologic disability evaluated by the EDSS, logMAR visual acuity and automated visual field indices.OCT seems to be a reproducible test to detect axonal loss of ganglion cells in MS. Further and larger longitudinal prospective studies would be valuable to assess the evolution over time of the RNFL measurements in Moroccan MS patients.
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Key words
Multiple sclerosis,Optic neuritis,Retinal nerve fiber layer,Optical coherence tomography
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