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To the Editor:
—After reading Dr. Kaufman's solicited comments on my letter to you, I feel, in the interest of clarity, that some additional statements should be made.I certainly have no quarrel with Dr. Kaufman's position that IDU represents a significant advance in the therapy of herpetic keratitis. Indeed, studies with our own preparation of IDU certainly tend to support the therapeutic findings presented in his article with Drs. Nesburn and Maloney in the May issue of the Archives.In defense of my comment that IDU inhibits both viral and cellular DNA, I should like to call attention to Dr. Kaufman's statement in his article (p. 590) where he points out that after all, "this drug was developed because of possible cytotoxic properties"; therefore, the logical assumption is that it does affect cellular DNA. In order to inhibit effectively the abnormally large amount of DNA being synthesized within a
Nelson EL. MORE ABOUT IDU. Arch Ophthalmol. 1962;68(2):300. doi:10.1001/archopht.1962.00960030304030