gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

Epithelial disk parameter after Epi-LASIK with the Centurion SES microkeratome

Meeting Abstract

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  • corresponding author P. Breil - Johannes Gutenberg University Mainz, Department of Ophthalmology, Mainz
  • L. Frisch - Johannes Gutenberg University Mainz, Department of Ophthalmology, Mainz
  • H. B. Dick - Johannes Gutenberg University Mainz, Department of Ophthalmology, Mainz

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogSO.04.08

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Veröffentlicht: 22. September 2004

© 2004 Breil et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen ( Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.




In contrast to the LASEK procedure the Epi-LASIK allows mechanical separation of the epithelium from the bowman layer without alcohol. In a pilot study we investigated epithelial disk ("flap") parameter intraoperatively after cut with the new Centurion SES microkeratome.


22 eyes of 11 patients, mean age 35 years were operated. Mean spherical equivalent was -3.3 dptr. (from -1.25 to -5.25 dptr.); mean astigmastism was -1.1 dptr. with a range from -0.25 to -2.5 dptr. Corneal thickness was measured directly before epithelial separation and after lifting the "flap" using the DGH 500 pachymeter (Fa. DGH Technology Exton, USA); the "flap" thickness was then calculated by substraction. The "flap" diameter and hinge width was measured with a special instrument, adapted at the curvature of the cornea.


The mean "flap" thickness valued 56.7 μm, ranging from 41 to 78 μm. In all cases an epithelial flap was separated, in no apparent case bowman layer was cut. The hinge width valued from 4.5 to 9.5 mm, mean 7.2 mm. In 4 cases a free "flap" occured, which could be exactly repositioned. "Flap" diameter ranged from 7.5 to 12.0 mm, mean 10.0 mm.


In the 22 myopic eyes Epi-LASIK, separation of the epithelium with the Centurion SES microkeratome was performed without complications. In order to achieve less variety in "flap" diameter, an individualisation of the mircokeratome ring size seems necessary.