Generic trypan blue as possible cause of a cluster of toxic anterior segment syndrome cases after uneventful cataract surgery.

Five of 16 patients having uneventful cataract surgery over 2 consecutive days presented on the first postoperative day with painless, unexpected blurry vision; marked limbus-to-limbus corneal edema; and severe anterior chamber inflammation with hypopyon and fibrin formation. Review of the records showed the 5 patients had received an intracameral injection of generic trypan blue solution 0.06% to facilitate the capsulorhexis. Patients who had not received the trypan blue injection had an uneventful first-day check and subsequent course. Management comprised intense topical steroids and close follow-up, which led to gradual improvement in all cases. The batch of trypan blue vials was withdrawn, and there were no additional cases of toxic anterior segment syndrome (TASS). This TASS cluster highlights a rarely reported cause of the syndrome, underscoring the need for thorough documentation of solutions and/or medications used intraoperatively and surgeon awareness of possible adverse events.