M K Tsilimbaris1, D G Vavvas2, N E Bechrakis3. 1. Department of Ophthalmology, University of Crete Medical School, Heraklion, Greece. 2. University of Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, MA, USA. 3. Department of Ophthalmology, Innsbruck Medical University, Innsbruck, Austria.