[Clinical use of ultrasonic distance measurements for close-to-wall foreign bodies in the eye (author's transl)].

The X-ray localization of intraocular foreign bodies is based on an average-sized schematic eye. Whether or not a foreign body only reached or penetrated the rear wall of the bulbus often cannot be decided safely - even if X-ray checks included other than straight forward gaze directions. By means of ultrasound it is possible. 1. to measure exactly the real dimensions of the patients eye and to alter the X-ray localization scheme (W. Comberg's scheme) correspondingly. This improves the accuracy of the X-ray localization technique. 2. To localize the foreign body directly and exactly by presentation of its echo. Simultaneous presentation of the bulbus rear wall echo permits determination of the foreign body position. - A case record is given.