gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

Functional topography in a new eye model SEE-KID

Meeting Abstract

  • corresponding author S. Priglinger - Sehschule Krankenhaus der Barmh. Brüder Linz, Linz, Austria
  • M. Buchberger - Sehschule Krankenhaus der Barmh. Brüder Linz, Linz, Austria
  • T. Kaltofen - Sehschule Krankenhaus der Barmh. Brüder Linz, Linz, Austria
  • R. Hörantner - Sehschule Krankenhaus der Barmh. Brüder Linz, Linz, Austria
  • T. Haslwanter - Sehschule Krankenhaus der Barmh. Brüder Linz, Linz, Austria

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogFR.10.05

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/dog2004/04dog251.shtml

Veröffentlicht: 22. September 2004

© 2004 Priglinger et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Objective

Our eye model SEE-Kid realizes a three dimensional (3D) biomechanical eye model. To describe eye motility disorders the graphic representation of "lever arm lines" is used. They represent the path of an eye muscle at the surface of the eye. An insertion line with the main function of the muscle represents the ideal muscle path. This is denoted as "functional topography". Its benefit is to demonstrate in oblique eye muscle disturbances.

Methods

The rotation of the eye is elicited by a torque acting on the sphere. In respect of the oblique muscles the muscle paths are determined by their functional origin and insertion. Their ideal insertion lines have to cross the so called "functional pole". This is the position with no ab- or adducting effect (V or A pattern). A misrouting away from this ideal insertion line (main lever arm line) creates an abnormal pattern of eye motility. In variation of muscle origin and insertion position the strabismus sursoadductorius (str.sursoadd.) is to simulate.

Results

Kolling characterises the str. sursoadd. as a congenital concomitant vertical deviation especially in adduction, with excyclorotation and a slight horizontal incomitance (alphabet pattern), binocular functions, high vertical fusion and head tilt. In our eye model the pattern of str. sursoadd. is to simulate by sagittalisation of inferior oblique muscle origin more than that of superior oblique muscle and by strenghtening and weakening their muscle components in a concomitant manner. An operation is done by approaching the functional pole. Irrespective of wheather the oblique muscles are close or far from the ideal muscle path the muscle function is normalized. This demonstrates the functional topography.

Conclusions

The strabismus sursoadductorius is defined exactly (Kolling). The SEE-KID model supports the 3D presentation of this pathology. The comparison of clinical defined motility disorders and their simulation is helpful to understand some causes and rules of eye motility disorders. Also rules and guidelines for oblique muscle surgery are given.