Abstract A PROGRAM of experimental research has been undertaken in cooperation with the Department of Physics at the Catholic University of America to study the production and possible clearing of opacities in the refractive media of the eye by means of ultrasonic irradiation. Although up to the present it has not been possible to clear such opacities, significant findings have been obtained in the study of the effects of intense ultrasonic waves in excised calves' eyes. It is the purpose of this paper to report this work at its present stage of development. The term "ultrasonics" designates sound waves having a frequency beyond the audible range, i. e., above 30,000 cps. Although ultrasonic waves differ from ordinary audible sound only by having a higher frequency and smaller wave length, these properties greatly influence their propagation through matter. Much information about the behavior of different media has been obtained using ultrasonic waves References 1. Bergmann, L.: Ultrasonics and Their Scientific and Technical Applications , Edition 3, Ann Arbor, Mich., Edward Bros., 1942. 2. Badtke, G.: Ultraschallbehandlung der Auges , Klin. Monatsbl. Augenh. 114:193-196, 1949 3. Nuovo Cimento, Atti del Convegno Internazionale di Ultracustica, Rome, July 14-17, 1950, Supp. 2, Vol. 7, Ser. 9, Sect. 4 and 5, Bologna, Nicola Fanichelli, Editore, 1951. 4. Ultrasonics in Diagnosis , Editorial. J. A. M. A. 146:1033 ( (July 14) ) 1951.Crossref 5. Fox, F. E.: The 1950 International Ultrasonics Congress at Rome, July 14-17, 1950 , J. Acous. Soc. Am. 23:233-234, 1951.Crossref 6. That is, energy passing through 1 sq. cm. per second. 7. Zeiss, E.: Über Linsenveränderungen an herausgenommenen Rinderlinsen durch Ultraschalleinwirkung , von Graefes Arch. Ophth. 139:301-322, 1938.Crossref 8. Cavitation is the production of small, gas-filled cavities in the sound-irradiated substance, as a result of alternating changes in pressure and temperature of the ultrasonic wave. 9. Kawamoto, I.: Experimental Studies on the Effect of Ultrasonic Waves on the Eyeball , Nippon Gankwa Gakukwai Zasshi 51:12-16 ( (Feb.) ) 1947. 10. Fox, F. E., and Griffing, V.: Experimental Investigation of Ultrasonic Intensity Gain in Water Due to Concave Reflectors , J. Acous. Soc. Am. 21:352-354, 1949.Crossref 11. Griffing, V., and Fox, F. E.: Theory of Ultrasonic Intensity Gain Due to Concave Reflectors , J. Acous. Soc. Am. 21:348-351 ( (July) ) 1949.Crossref 12. In order to distinguish this type of irreversible ultrasonic opacity from those described by Zeiss and Kawamoto, we shall refer hereafter to this opacity as the Lavine cataract. 13. Berens, C.: The Eye and Its Diseases , Edition 2, Philadelphia, Saunders Company, 1950. 14. Duke-Elder, W. S.: Textbook of Ophthalmology, Vol. III: Diseases of the Inner Eye , St. Louis, C. V. Mosby Company, 1941.
A.M.A. Archives of Ophthalmology – American Medical Association
Published: Feb 1, 1952
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