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Show LETTERS TO THE EDITOR 59 Editorial Comment The letter from Dr. Arnold alerts us to a possible cause and effect of raising intraocular pressure (in this case by pneumoplethysmography) and the subsequent development of ischemic optic neuropathy. Ophthalmodynamometry, ophthalmodynamography, and tonography (direct or by suction cup), all of which raise intraocular pressure for variable lengths of time, have been used clini-cally for more than two generations without a smattering of reports of such an association. This does not negate Dr. Arnold's observation but puts it in a broader perspective of the overall safety of these noninvasive tests. Ronald M. Burde, M.D. Washington University School of Medicine St. Louis, MO 63110 Correction Optic Nerve Hypoplasia: Papillary Diameter and Clinical Correction By Laurent Beuchat and Avinoam B. Safran J Clin NeuTa-aphthalmal 1985;5:249-53. p. 250, right column, line 14: "In addition, we used a slip-lamp and a contact lens similar to those used by Franceschetti and Bock (4). Therefore, width values obtained from the scale on the knob were corrected with the indications provided by Franceschetti and Bock." I Clin Neuro-ophfhalmol, Vol. 7, No.1, 1987 |