Polyquaternium-1–Associated Dendritiform Keratopathy

Purpose:To report a case of polyquaternium-1 (Polyquad, PQ-1)–associated dendritiform keratopathy that developed after exposure to the tear substitute Systane (Alcon Laboratories, Inc, Fort Worth, TX).Methods:A retrospective review of the case was performed.Results:Dendritiform keratopathy developed