Randomized control trial of evaluation of Clemastine effects on visual evoked potential, nerve fiber layer and ganglion cell layer complex in patients with optic neuritis.

**OBJECTIVES:** Optic neuritis (ON) is the most common cause of optic neuropathy; typically presenting with a unilateral visual loss in young adults, with incidence of 1-5 in 100,000 per year. We evaluated the effect of Clemastine, a first-generation and CNS (central nervous system)-penetrant H1 receptor antagonist on visual evoked potential (VEP), retinal nerve fibre layer (RNFL) and ganglion cell layer (GCL) complex in patients with optic neuritis. **PATIENTS AND METHODS:** This is a prospect...