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To the Editor:
An important error occurred in the description of the methodology in our article, "Comparison between Pilocarpine and Echothiophate for Chronic Simple Glaucoma," Arch Ophthal 72:485-489, 1964. The times of administration of pilocarpine 4% were 7 am, 12 midday, 6 pm, and 10 pm, and not as printed in the Archives as 10 am, 2 pm, 6 pm, and 10 pm.
Pratt-Johnson JA, Drance SM. PILOCARPINE VS ECHOTHIOPHATE IODIDE. Arch Ophthalmol. 1965;73(2):308. doi:10.1001/archopht.1965.00970030310034