Naismith et al. state that they preferentially recruited patients with severe optic neuritis (with ≤20/200 vision) and poor recovery (to <20/40 vision).This bias in selecting study participants ...

Optic Neuritis: Clinical Features Optic neuritis ... visual prognosis, acute treatment, and long-term MS risk for patients with DON. [9–12] ...

Optic neuritis occurs because of swelling in or around the optic nerve. For those with MS-related optic neuritis, the swelling subsides on its own, and vision usually recovers.