Clinical ultrasonography of intraocular foreign bodies.

Abstract

92 eyes have been examined with A-scan ultrasonography (8 MHz, Kretz-Technik apparatus 7100 MA and 7200 MA). Ultrasonic location of nonmagnetic and magnetic foreign bodies is compared to Comberg's radiographs and to intraoperative methods usch as stereoradioscopy or transillumination with the glass fiber diaphanoscope. Definitely corresponding results have been obtained in 60 cases. Ultrasonic location was difficult with small foreign bodies (reflecting surface less than 2 mm-2) within the orbit, the sclera, or within less than 2 mm from the sclera, as well as in severe vitreous clouding. Such cases should be evaluated with all location procedures available before considering further management.