This prospective randomized clinical study aims to evaluate the efficacy and safety of autologous platelet-rich plasma (PRP) injection in patients with acute non-arteritic anterior ischemic optic neuropathy (NAION). Eligible patients are randomly assigned to receive posterior subtenon PRP injections or to an observation-only control group. The PRP group receives injections at baseline and during follow-up. Comprehensive ophthalmologic evaluations, including best-corrected visual acuity, visual field testing, and retinal nerve fiber layer thickness measurements, are performed at baseline and scheduled follow-up visits. The primary outcomes include changes in visual function and structural optic nerve parameters, as well as the incidence of treatment-related adverse events.