RecruitingPhase 3Drug trialEfficacy and Safety of Intranasal Cenegermin in Adult Participants With Non-Arteritic Anterior Ischemic Optic Neuropathy (NAION)This is a phase 3, randomized, multicenter, vehicle-controlled, double-masked study to evaluate the efficacy and safety of intranasal cenegermin compared with vehicle control in adult participants with NAION. Approximately 272 participants who meet all eligibility criteria will be randomly assigned in a 1:1 ratio to receive either cenegermin treatment (Group 1) or the vehicle control (Group 2).