Predicting bacterial cause in infectious conjunctivitis

Editor—The interesting and potentially valuable study reported by Rietveld et al discusses the prediction of the bacterial cause of infectious conjunctivitis.¹ But can the authors please clarify what they mean by a “history of conjunctivitis”?¹ Do they mean a history of conjunctivitis, recent injected conjunctivae, or what? What question were patients asked—surely they did not ask, “Do you have a history of conjunctivitis?” or its Dutch equivalent?