From the Department of Ophthalmology, Goethe University, Frankfurt, Germany (Arad, Engel, Schmack, Kohnen); Institute for Biostatistics, Goethe University, Frankfurt, Germany (Ackermann).

Corresponding author: Tschingis Arad, MD, FEBO, Department of Ophthalmology, Goethe University, Universitätsklinikum Frankfurt, Theodor-Stern-Kai 7, D-60590 Frankfurt, Germany. Email: [email protected]

Disclosures: T. Kohnen received research funding and was an advisor for Alcon Laboratories, Inc., Novartis Corp., Avedro, Inc., Johnson & Johnson Vision, Lensgen, Oculentis GmbH, Oculus Optikgeräte GmbH, Presbia Coöperatief U.A., Schwind eye-tech-solutions GmbH & Co. KG, Carl Zeiss Meditec AG, Berater für Allergan, Bausch & Lomb, Inc., Dompé, Geuder, Med Update, Nevakar, Santen GmbH, STAAR Surgical Co., TearLab Corp., Thieme Compliance GmbH, and Ziemer Ophthalmology GmbH. None of the other authors has any financial or proprietary interest in any material or method mentioned.

First author:Tschingis Arad, MD, FEBODepartment of Ophthalmology, Goethe University, Frankfurt, Germany