Abstract
This preliminary report indicates that ultrasound can retrodisplace retinal tissue in certain cases of retinal detachment. Best movement of retinal detachment occurred in those cases exhibiting retinal holes (rhegmatogenous detachments). A 1 megahertz transducer was used. The ultrasonic energy was pulsed. Quantitative measurements of ultrasonic energy delivered from the transducer gave results of 1.95 watts/ sq cm employing a calorimeter. After histopathologic evaluation of 100 rabbit eyes showed no adverse effects on ocular tissue, the transducer was used to treat human retinal detachments. Results indicate that ultrasound may prove to be a prognostic test for successful surgical reattachment of detached retinae. Ultrasound may also prove useful in treating giant retinal breaks, external dissolution of vitreoretinal adhesions, and positioning air bubbles placed within the vitreous cavity.
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