9. Acknowledgments
This work was supported by a grant (B.R.M.) from the NIH, National Eye Institute, EY-06958. The authors thank Dr. Andreas A. Thaer for his collaboration in the development of the clinical confocal microscope, Beatrice Frueh, MD, for recording the patient shown in fig.35; Prof.G.Grabner for referring the patients shown in figs. 60 - 63, Robin Cadez, MD, for practical asistance and technical advice in digital data processing, and Hans Kuenzli and his staff for their tremendous work with the photographic prints.