The goal of this clinical trial is to evaluate the safety and efficacy of privosegtor, a neuroprotective candidate, in patients diagnosed with optic neuritis (ON).

Researchers will compare privosegtor and the standard of care (methylprednisolone) to a placebo and standard of care (methylprednisolone).

Key Inclusion Criteria:

• Adult men and women (aged 18 to 50 years) with the first episode of ON in the study eye, associated with unilateral visual loss.
• Onset of visual loss symptoms in the previous 12 days before first administration of study treatment.

Key Exclusion Criteria:

- Have a history or presence of any disorder or condition that may, in the opinion of the Investigator, likely interfere with the interpretation of the study results or participant safety