Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Comparison of the corneal flap edges using different resection methods of Femto LDV

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Session Details

Session Title: Presented Poster Session: Laser Refractive Surgery (Lasers/LASIK/Epi-LASIK)

Session Date/Time: Sunday 11/09/2016 | 09:30-11:00

Paper Time: 10:50

Venue: Poster Village: Pod 2

First Author: : J.Ventruba CZECH REPUBLIC

Co Author(s): :    U. Tavandzi   F. Marsak           

Abstract Details


To analyze and compare two different types of border cuts in patients after femtosecond LASIK at 2 and 12 months postoperatively.


European Eye Clinic Lexum, Czech Republic, Optegra Eye Sciences


Study of 120 consecutive eyes, who underwent LASIK using femtosecond laser LDV Z6 (Ziemer). Two types of border cuts were used: “Classic” (66 flaps) – zigzag resection for both stroma and border or “Crystal” (54 flaps) – with in-plane circular rim cut. Flap edges, intraoperative and postoperative flap complications were evaluated. Slit-lamp grading of flap edges (FE ratio): 0-almost invisible edge, 1-clearly visible sharp edge, 2-slight greying at the edge in one quadrant, 3-slight greying in two and more quadrants, 4-small local peripheral epithelial ingrowth without progression, 5-peripheral epithelial ingrowth required surgical intervention.


Intraoperatively, there were no complications in both groups (0% opaque bubble layer, 0% tissue bridges, 0% incomplete flaps). The cutting process is slightly faster in the Classic group (avg. 19 seconds) than in the Crystal group (avg. 24 seconds). Postoperatively, the Classic and Crystal cuts achieved similar FE ratio at 2 months (p=0.79): Classic avg.1,8 / median 2 (range 0-4) and Crystal avg.1,9 / median 2 (range 0-4) and at 12 months (p=0.55): Classic avg.1,5 / median 1 (range 0-4) and Crystal avg.1,7 / median 1 (range 0-4). There were no postoperative flap complications.


Both resection methods of Femto LDV Z6 have shown very good efficiency and safety for the creation of the corneal flaps and have similar flap edges in the postoperative period. None of the eyes required postoperative surgical intervention. However, the Z6 Classic cut would be the preferred choice because of the faster procedure and thus shorter vacuum time.

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