Der OphthalmologeNovember 2013, Volume 110, Issue 11, pp 1097–1115 | Cite asMitteilungen der DOGMitteilungen der DOGFirst Online: 16 November 2013 138 Downloads This is a preview of subscription content, log in to check access.PreviewUnable to display preview. Download preview PDF.Unable to display preview. Download preview PDF.Copyright information© Springer-Verlag Berlin Heidelberg 2013