Proceedings of the 9th Annual Meeting of the Bielschowsky-Gesellschaft, Heidelberg, Germany, November 8th to 10th 2002: The meeting was organized by the German Orthoptic Association (Mrs. M. Lenk-Schafer and Mrs. D. Verlohr) and the Department of Strabismology and Neuro-ophthalmology, University Eye Clinic, Ruprecht-Karls University, Heidelberg, Germany