Treatment of Nonarteritic Anterior Ischemic Optic Neuropathy (NAION)
Nonarteritic anterior ischemic optic neuropathy (NAION) is an acute ischemic disorder of the optic nerve head, presenting with sudden visual loss and optic disk edema. Prompt recognition and a structured treatment approach are essential to support visual recovery.
Clinical Goals
Treatment aims for improvement in visual acuity and visual fields — with meaningful gains expected by approximately 6 months — alongside resolution of optic disk edema, a key early clinical endpoint.
Treatment Approach
First-line management centres on a structured oral corticosteroid course, tailored and tapered according to clinical response — specifically the status of optic disk edema.
The complete regimen, including the full tapering schedule and response-guided adjustments, is available in the structured protocol.
References
DOI: 10.1016/j.survophthal.2009.06.008
- Patients were initially given 80 mg of prednisone daily for 2 weeks, followed by a taper every 5 days to 70 mg, 60 mg, and then decreasing the dose by 5 mg every 5 days to 40 mg until the optic disk edema was no longer present.
- Prednisone was rapidly tapered off completely following resolution of disk edema.
- In those treated with steroid therapy within 2 weeks, the median time to optic disk edema resolution was 6.8 weeks, compared to 8.2 weeks in untreated cases (p<0.0001).
- In both the treated and untreated groups, the visual acuity and visual fields kept improving up to about 6 months, and very little thereafter.
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