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Anne Henneken, MD; Robert Machemer, MD
Durham, NC

Arch Ophthalmol. 1991;109(3):320.

	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.

—We observed an interesting and unexpected ultrasonographic phenomenon in a patient whose silicone oil had been removed after successful vitreous surgery for proliferative vitreoretinopathy. During a routine postoperative slit-lamp examination, a few silicone oil droplets were observed circulating in the vitreous cavity. The retina was attached ophthalmoscopically. To document the retinal reattachment, we performed a combined A- and B-scan ultrasonographic examination. To our surprise, a highly reflective image appeared that resembled a shallow or localized retinal detachment (Fig 1). A moment later, the detachment disappeared and we observed highly reflectile short linear images within the vitreous cavity (Fig 2). The images were found to be circulating in a counterclockwise direction.

Our explanation of this interesting phenomenon is as follows: the linear reflections were caused by silicone oil droplets. These reflections temporarily consolidated adjacent to the retinal surface and resembled a shallow retinal detachment. This phenomenon is caused . . . [Full Text PDF of this Article]

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