A 26-year-old woman presented herself at the emergency room with pain, photophobia, and foreign body sensation in her right eye. These symptoms appeared immediately after breaking a leaf of the house plantDieffenbachia 1 day earlier. She was otherwise healthy, except for an adenovirus keratoconjunctivitis 4 years earlier in her left eye. The patient’s ocular examination on presentation showed a best corrected visual acuity of 20/25 in the right eye and 20/20 in the left eye. Slit-lamp biomicroscopy of the right eye showed fine punctate opacities throughout the corneal stroma. The remainder of the ocular examination was normal, except for subepithelial opacities in the left cornea related to the previous adenovirus infection.