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Gilbert Baum, M.D.
Veterans Administration Hospital 130 W. Knightsbridge Rd. Bronx 68, N.Y.

Arch Ophthalmol. 1961;66(4):608-609.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor:

—(Letter addressed to Dr. A. R. Irvine, Jr. in regard to the latter's "Annual Review: The Lens and Vitreous," ARCH. OPHTHAL. 65:592, 1961.)

In referring to my paper there is one misunderstanding which I feel should be corrected. The last sentence of your article reads, "Intense and prolonged ultrasound may produce 3 types of intraocular lesions; heat coagulation of tissues; bubble formation secondary to cavitation phenomenon; and displacement of retinal cells unless irradiation is done in a vacuum." The word vacuum is erroneous. The last phrase refers to the paper by Donn, A.: Ultrasonic Wave Liquefaction of the Vitreous Humor in Living Rabbits, A.M.A. Arch. Ophthal. 53:215, 1955, who had injected air into the vitreous so that he might liquefy the vitreous by intense ultrasonic radiation.

In my discussion of Dr. Donn's work I stated, "Donn modified the conditions under which radiation was performed by injecting . . . [Full Text PDF of this Article]

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