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    A paradoxical discrepancy between severe peripapillary retinal nerve fiber layer (pRNFL) atrophy and good visual outcome had been reported in patients with myelin oligodendrocyte glycoprotein-immunoglobulin G (MOG-IgG)-associated optic neuritis (ON). However, only visual acuity (VA) was assessed. To study visual field (VF) outcomes of patients with MOG-IgG-associated ON and evaluate the correlation between functional eye outcome and retinal structural changes assessed by optical coherence tomography. The records of 32 patients with MOG-IgG-associated ON who underwent ophthalmological examination at least 12 months after ON onset were reviewed. Degree of VF disability was determined by mean deviation (MD). At final assessment (median, 35 months), 4.2% of 48 affected eyes (AE) had VA ⩽ 0.1, 40% had abnormal MD, and among AE with final VA ⩾ 1.0, 31% had mild to moderate damage. Thinning of the inner retinal layers was significantly correlated with MD impairment. Analysis demonstrated a threshold of pRNFL thickness (50 µm), below which MD was significantly worse (mean, -2.27 dB vs -17.72 dB; p = 0.0003). ON relapse was significantly associated with poor visual outcome assessed by MD. Functional impairment measured with VF is not rare, and MD assessment better reflects actual structural damage.


    Romain Deschamps, Manon Philibert, Cedric Lamirel, Jerome Lambert, Vivien Vasseur, Antoine Gueguen, Caroline Bensa, Augustin Lecler, Romain Marignier, Catherine Vignal, Olivier Gout. Visual field loss and structure-function relationships in optic neuritis associated with myelin oligodendrocyte glycoprotein antibody. Multiple sclerosis (Houndmills, Basingstoke, England). 2021 May;27(6):855-863

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    PMID: 32633601

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