Clinical Challenges in Managing Bilateral Acute Iris Transillumination: Insights From a Case Triggered by Fluoroquinolone Therapy
Abstract
Bilateral acute iris transillumination (BAIT) is a rare ocular condition characterized by acute pigment dispersion from the iris pigment epithelium (IPE), resulting in diffuse iris transillumination, atonic mydriatic pupils, and intraocular hypertension. BAIT is often associated with severe photophobia and requires extended medical management. Differentiating BAIT from related conditions such as bilateral acute depigmentation of the iris (BADI) is critical, as BAIT presents with a more severe clinical course and lasting complications. Trigger factors include respiratory infections and fluoroquinolone use, particularly moxifloxacin. This report details a case of BAIT following oral moxifloxacin use. A 69-year-old male patient presented with bilateral ocular redness, pain, and severe photophobia one day after receiving an influenza vaccination and one-week post-moxifloxacin treatment. Examination revealed bullous keratopathy and bilateral iris depigmentation with transillumination. Moreover, Goldmann applanation tonometry showed an elevated intraocular pressure (IOP) exceeding 35 mmHg. Initial management included antiviral, anti-inflammatory, and IOP-lowering agents, which improved symptoms but revealed persistent pigment dispersion, atonic pupils, and recurrent IOP elevation during corticosteroid tapering. Long-term treatment with carbonic anhydrase inhibitors and alpha-adrenergic blockers stabilized IOP, but persistent iris atrophy and pigment dispersion were noted after one…
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