[1] Univ Vienna, Sch Med, Allgemeines Krankenhaus, Dept Ophthalmol, A-1090 Vienna, Austria
[2] Univ Vienna, Sch Med, Allgemeines Krankenhaus, Dept Biomed Engn & Phys, A-1090 Vienna, Austria
[3] Landeskrankenhaus Salzburg, Dept Ophthalmol, A-5020 Salzburg, Austria