[Ultrasound localization of haptics of sclera attached posterior chamber lenses. Comparison of 2 high resolution ultrasound instruments].

BACKGROUND

The ciliary sulcus as the intended location of transsclerally fixated posterior chamber lenses (PCL) is withdrawn from the surgeon's view. Using high-resolution ultrasound, we acquire pictures that postoperatively allows us to determine the position of the haptics.

METHODS

After transscleral fixation of PCLs in nine patients, we localized the haptics (central part and distal part of the haptic) by high-resolution ultrasound using the Ultrasound Biomicroscope 840 (Humphrey, 50 MHz) and the 13-System-ABD (M & C, 20 MHz).

RESULTS

In most cases the central part of the haptic was located in the ciliary sulcus (UBM 840: 11/18; 13-System-ABD: 13/18). The peripheral part of the haptic could not be located in the ciliary sulcus in most cases (UMB 840: 5/18, 13-System-ABD: 6/18). In 6/36 cases the results of evaluation of the positioning of the haptic were different in both ultrasound examination systems.

CONCLUSIONS

Both kinds of instruments lead to a sufficiently exact location of the haptics in all cases. Due to the higher resolution of the UBM 840 the structures of the ciliary body can be better demonstrated. The disadvantage, however, is that the instrument is more difficult to handle than the 13-System-ABD.