97th DOG Annual Meeting 1999
BINOCULAR THREE-DIMENSIONAL VIDEOOCULOGRAPHY (B3D-VOG)
ONLINE SQUINT ANGLE MEASUREMENT FOR BOTH EYES SIMULTANEOUSLY WITH FREE MOTILITY OF THE HEAD
K. H. Wassill, H. Kaufmann
In the past it was always a wish to measure squint angles in three dimensions simultaneously. Most naturally there is a desire for such a tool, especially if surgical procedures are performed, which affect three dimensions of ocular motility. Changes of the subjective horizontal are a well known disturbing factor in binocular motility analysis during N. 4 palsies. This emphasizes the urgent need for a three dimensional, binocular method.
Method: Special modifications of a videographic method deliver simultaneous online data about the 3D position of the eyes. The interocular difference is equal to the amount of squint, depending on the direction of gaze, on head-tilt/direction of gravity, and convergence.
Results: The method to be introduced delivers:
1. a three-dimensional, binocular documentation of ocular movements
2. an improvement of pre- and postsurgical examination, especially of rotational disturbances
3. an objective means for comparing the results of different surgical procedures.
Augenklinik für Schielbehandlung und Neuroophthalmologie der Justus-Liebig-Univ. Giessen