To the Editor.
—Loeffler and Hornblass1 call attention to the hazards of unit dose artificial tear preparations. In their letter they state that "we describe a complication of the package not yet reported, to our knowledge." I wish to call the authors' attention to the fact that this complication has been reported previously.2 Nonetheless, their correspondence rightly emphasizes the potential complication that can arise from this particular unit dose pack.
Nelson JD. Hazards of Unit Dose Artificial Tears. Arch Ophthalmol. 1991;109(2):173. doi:10.1001/archopht.1991.01080020019004