View clinical trials related to Optic Neuritis.
Filter by:In eight ophthalmic units, the investigator will include all inflammatory optic neuritis (ON) during acute phase and rank them in two groups: 1/ ON with autoantibodies anti-myelin-oligodendrocyte-glycoprotein (ON MOG+) 2/ ON MOG-. The investigators will measure incidence of MOG-Ab in our prospective population of inflammatory ON. Then the investigator will compare clinical and radiological presentation of ON MOG+ versus ON MOG-.
This is a phase II randomized double-blind placebo/standard of care trial to determine if rapidly inducing vitamin D sufficiency in patients with acute optic neuritis results in less damage/greater recovery at 12 months as measured by optical coherence tomography, visual evoked potentials, visual acuity and radiological measures. Our hypothesis, based on earlier observational studies, is that acute optic neuritis in the context of vitamin D sufficiency results in better visual outcomes compared to those that are not sufficient acutely, regardless of such interventions as steroid therapy.
The purpose of this study is to determine whether gypenosides are neuroprotective in patients with acute optic neuritis.
Optic neuritis typically occurs in young (mean age, 32 years), female (77%) patients, and it presents as subacute monocular visual loss that develops over several days. As yet, treatment with intravenous corticosteroid for optic neuritis had no long-term beneficial effect on vision. There are a number of factors that contribute to nerve fibre damage including increased level of sodium, so blocking sodium entry could help to protect them against damage. The main objective of the study is determine whether phenytoin (which blocks sodium entry) can protect nerve fibre and improve final visual function after optic neuritis.
Retrobulbar optic neuritis (NORB) is the damage to the optic nerve caused by inflammation. It causes a rapidly progressive and painful visual loss, often among young subjects. Diagnosis confirmation is important to start proper treatment, because a NORB is often the first symptom of multiple sclerosis. This diagnosis, based on a set of arguments, is difficult to define by a non-expert ophthalmologist. The pupillary light reflex is a way to test the visual afferent pathways. If it is subject to a large inter-individual variability, the dynamics of the pupillary light reflex and its latency are more reproducible. An easy way to study the dynamics of the pupillary light reflex is to study the pupillary cycle time (PCT). In the case of NORB, elongation of the conduction in the visual afferent pathways related to demyelination plate increases the latency of the pupillary light reflex and decreases the frequency of the PCT. Our hypothesis is that PCT dynamics measures would be a reliable indicator and easy to evaluate some pathologies affecting the integrity of the nerve. The validation of a decrease in the frequency of the PCT in NORB, compared to the frequency observed in subjects ophthalmological or neurological disease, could help developing methods to study the conduction of the visual pathways with portable devices used during the standard ophthalmologic consultation and quickly orientate patients to specialized centers.
To evaluate the optical coherence tomography (OCT), visual field (VF), Visual evoked po-tential(VEP) characteristics between neuromyelitis optica- related optic neuritis (NMOSD-ON) and multiple sclerosis- related ON (MS-ON) in a Chinese cohort.
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.
The primary objective of the study is to characterize the pharmacokinetics (PK) of BIIB033-B and to compare the PK profile with that of BIIB033-A in healthy volunteers. Secondary objectives are: To assess the safety and tolerability of BIIB033-A and BIIB033-B; To assess the secondary PK parameters of BIIB033-A and BIIB033-B; To assess the immunogenicity of BIIB033-A and BIIB033-B.
The primary objective of the study is to assess full-field visual evoked potential (FF-VEP) latency in subjects who were enrolled in Study NCT01721161 2 years (+ up to 12 months) after the last study visit. The secondary objective is to assess clinical progression and severity of central nervous system (CNS) demyelinating disease in subjects who were enrolled in Study NCT01721161 2 years (+ up to 12 months) after the last study visit. Intervention was administered in the previous study. The participants, investigator and outcome assessors remain blinded in this follow-up study.
Optic neuritis (ON) can remain isolated or reveal a widespread and chronic disease of the central nervous system (CNS), a multiple sclerosis (MS) or, more rarely, a Devic's neuromyelitis optica (NMO) or a systemic disease. The optical coherence tomography (OCT) is a retinal imaging technique to measure the thickness of the retina and its different layers with an accuracy of 4-6 µM. Costello et al have shown that approximately 75% of 54 MS patients have developed within 3 to 6 months after a ON a loss of 10 to 40 µM in the thickness of the peripapillary retinal nerve fiber layer (RNFL). The etiologic diagnosis of ON has been transformed in recent years. MS can now be diagnosed by McDonald's MRI criteria and NMO by the AQP4 antibodies (anti-aquaporin- 4) antibodies and the anti-MOG (myelin-oligodendrocyte glycoprotein) antibodies. The diagnosis and prognosis value of the OCT in patients with ON is not well known