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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Is the flap meniscus or planar? A comparison of flap profiles between three microkeratomes, two mechanical and one femtosecond laser

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Session Details

Session Title: Presented Poster Session: Femtosecond-Assisted Refractive Surgery

Session Date/Time: Saturday 10/09/2016 | 09:30-11:00

Paper Time: 09:40

Venue: Poster Village: Pod 2

First Author: : M.Bohac CROATIA

Co Author(s): :    M. Anticic   M. Koncarevic   A. Dukic   N. Gabric   S. Patel  

Abstract Details


To compare flap thickness profile of two microkeratomes and a femtosecond laser with high resolution anterior segment optical coherence tomography (OCT).


Specialty Eye Hospital „Svjetlost“,Zagreb, Croatia; School of Medicine University of Rijeka, Rijeka, Croatia


150 patients(300 eyes) with myopic astigmatism were equally divided into 3 groups for flap creation. Group I, flap created with Moria M2 microkeratome(90µm head), group II, with Moria SBK One Use Plus microkeratome(90µm head), group III, flap with Ziemer Femto LDV femtosecond laser(110µm foil). Intraoperative central flap thickness(CCT) with hand held pachymeter was obtained and 1 month postoperative flap thickness and profile were measured with OCT. Flap profile was measured in two axes(90° and 180°) and 5 points(central and two peripheral points at 2 and 4mm from center).


Intraoperative CCT in group I was 110,91±15,79µm, in group II was 98,08±13,33µm and in group III was 103,52±13,89µm. Intraoperative CCT was significantly thicker in comparison to CCT obtained from OCT (p<0,005). Percentage of change from center to the periphery in all three groups revealed meniscus shaped flap in all three groups. The highest average difference from the center to the periphery had group III and the lowest group II. However, group III had the lowest standard deviation in flap thickness in all 5 measurement points. Group III cases showed the most consistent flap.


All three groups had a consistent negative meniscus shaped flap profile. We did not encounter any planar flaps. Intraoperative CCT was near the intended value, while CCT obtained from OCT was lower than intended. Deviation in flap thickness was the lowest in group III.

Financial Disclosure:


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