Session Title: Refractive II
Session Date/Time: Saturday 04/02/2012 | 08:30-11:00
Paper Time: 09:16
Venue: Grand Ballroom
First Author: : M.Anticic CROATIA
Co Author(s): : N. Gabric M. Bohac
Purpose:
To compare induction of corneal high-order aberrations and visual acuity after LASIK with the flap created with Ziemer LDV femtosecond laser and Moria M2 mechanical microkeratome.
Setting:
Eye Clinic „Svjetlost“, Zagreb, Croatia
Methods:
This study included 66 patients (132 eyes) who underwent flap creation with Ziemer LDV (60 eyes) and Moria M2 mechanical microkeratome (72 eyes) in the past 6 months. The patients were devided in two groups. In the first group LDV femtosecond system was used to prepare the flaps (110 foil), and in the second group Moria M2 microkeratome (90 μm head). All ablations were made with SCHWIND AMARIS 750S excimer laser. Preoperative and postoperative Wavefront aberrometry was performed using a Hartmann-Shack device L80WAVE+ (Visionix). Mean preoperative sphere was -3.84 ± 0,03 D and mean cylinder was -0,64 ± 0,21 D for both groups. Preoperatively there was no statistical difference in corneal optical aberrations between eyes (p=0,4 for coma and p=0,09 for trefoil). Clinical outcomes were evaluated in terms of amount of wavefront aberrations and refractive outcome. RESULTS Mean postoperative sphere in Ziemer LDV was -0,01 ± 0,55 D and in Moria M2 group was 0,08±0,59 D, mean cylinder for Ziemer LDV was -0,17 ± 0,04 D, and for Moria M2 was -0,28 ±0,45D. There was no statistically significant difference between preoperative and postoperative high order aberrations in Ziemer LDV group (p = 0,3 for coma, and p= 0,65 for trefoil), and in Moria M2 group (p=0,5 for coma, and P= 0,22 for trefoil). There was also no statistically signifficant difference in induction for high order abberations between groups (p= 0,45 for coma, and p= 0,87 for trefoil) neither in mean postoperative sphere or cylinder (p=0,6 for sphere and p=0,4 for cylinder).
Conclusions:
We found no statistically significant difference in the induction of corneal higher order aberrations when comparing Moria M2 microkeratome and Ziemer FEMTO LDV. The planar configuration of the femtosecond laser flap did not offer any advantage in reduction of induced high order aberrations or visual acuity 6 months after LASIK.
Financial Disclosure:
No
