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Posterior Segment Ultrasonography

Ophthalmic ultrasonography uses high-frequency sound waves, which are transmitted from a probe into the eye. As the sound waves strike intraocular structures, they are reflected back to the probe and converted into an electric signal. The signal is subsequently reconstructed as an image on a monitor, which can be used to make a dynamic evaluation of the eye or can be photographed to document pathology. This instrument is extremely valuable when Dr. Fern’s view inside the eye is obstructed by blood, an extremely dense cataract, or other cloudy media.

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