%0 Case Reports %T [Confocal microscopy for the diagnostics of fungal keratitis]. %A Daas L %A Viestenz A %A Bischoff M %A Hasenfus A %A Seitz B %J Ophthalmologe %V 113 %N 9 %D Sep 2016 %M 26832732 %F 1.174 %R 10.1007/s00347-015-0206-4 %X Fungal keratitis is a rare but very serious eye disease in industrial nations with a frequency of 1-5 % of all forms of keratitis from microbial causes. We present two patients with keratitis of primary unknown cause. Using confocal microscopy fungal filaments could be identified that partially showed a parallel configuration (like "railway tracks"). Thus, the correct diagnosis can often be made and suitable therapy can be non-invasively initiated even before the results of in vitro cultivation (fungal culture), polymerase chain reaction (PCR) and histological investigations are available.