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To the Editor.
—In the article by Robert P. Murphy, MD, and Peter R. Egbert, MD, entitled "Regression of Iris Neovascularization Following Panretinal Photocoagulation" in the April Archives (97:700-702, 1979), the authors report a well-documented case of rubeosis iridis that disappeared after panretinal photocoagulation and was proven histopathologically.The essential purpose of panretinal photocoagulation treatment for rubeosis iridis is to cause the iris blood vessels to regress in a patient in whom glaucoma has developed secondary to the fibrosis associated with the new vessel formation. When the vessels regress after panretinal photocoagulation, a glaucoma filtering procedure can be done safely and without hemorrhage, allowing the eye to be normotensive if it cannot be made so with medication.I have now treated three patients with panretinal photocoagulation for rubeosis iridis in which the new blood vessels disappeared but the intraocular pressure remained substantially elevated because of the remaining fibrosis within the
Schatz H. Panretinal Photocoagulation. Arch Ophthalmol. 1979;97(11):2212. doi:10.1001/archopht.1979.01020020518026