Amantadine induced interface fluid formation after LASIK. A case report.

Purpose: To describe a case of bilateral interface fluid formation 2 years after laser-assisted in situ keratomileusis (LASIK) surgery caused by the side effect of amantadine.

Observations: A 47-year-old male patient with a history of Parkinson's disease treated with amantadine who had uneventful LASIK surgery in both eyes 2 years ago, presented with a decline in vision over the past 6 weeks. Results: Best corrected vision was 20/200 and 20/400 in the right and left eye respectively. Intraocular pressures were measured within the normal range. Biomicroscopic exam showed bilateral corneal edema. Anterior segment optical coherence tomography (AS-OCT) revealed fluid accumulation within the LASIK flap interface in both corneas. The patient's corneal edema and fluid in the interface began to gradually resolve, and vision improved 2 weeks after discontinuing amantadine.

Conclusions And Importance: Although there is no previous report, it is possible that amantadine may cause interface fluid formation in patients with LASIK surgery.