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To the Editor.
—I have read the paper by Abramson et al titled "Pilocarpine: Effect on the Anterior Chamber and Lens Thickness" (87:618, 1972). The author states that Dr. Wilkie and I found the peak of anterior chamber shallowing to occur three hours after instillation of 2% and 4% pilocarpine. I would like to draw their attention to the fact that our figures show that the peak of shallowing occurred one hour following the instillation. Our data therefore correspond to theirs, but they are right that we did not record any earlier than one hour. Maximal changes might therefore have occurred prior to our first reading.