gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

The ciliary muscle activity in pseudophakic eyes

Meeting Abstract

  • corresponding author O. Stachs - Department of Ophthalmology, University of Rostock
  • H. Schneider - Department of Ophthalmology, University of Rostock
  • H. Martin - Institute for Biomedical Engineering, University of Rostock
  • R. F. Guthoff - Department of Ophthalmology, University of Rostock

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogDO.04.03

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Veröffentlicht: 22. September 2004

© 2004 Stachs et al.
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To be able to restore human accommodation and the development of new accommodative IOL generations many hurdles have to be taken. One of them is to show that the ciliary muscle in older eyes remains active. The aim of the study is the analysis of the muscle activity in pseudophakic eyes.


Using a special designed 3D ultrasound biomicroscope in combination with contour approximation procedures the shape changes of the ciliary muscle in human pseudophakic volunteers (n=6, mean age 66) are determined as a function of the accommodation stimulus. The shape changes were analysed 6 month after IOL implantation. Accommodative studies have been carried out using pharmacologically induced accommodation.


The 3D ultrasound biomicroscopy in combination with the developed approximation algorithm allow a qualitative description of accommodative ciliary muscle changes. During accommodation in the investigated pseudophakic eyes a shift in the ciliary muscle center of gravity of 0.14 mm (median 0.11 mm) towards the lens equator was observed.


The ciliary muscle remains active in old pseudophakic eyes and is comparable to old phakic eyes, though the activity is highest for young eyes. It seems that in restoring human accommodation the remaining ciliary muscle activity in old eyes is sufficient.