Corneal flap symmetry in the optical center using anterior segment optical coherence tomography: mechanical vs femtolaser flaps

Session Details

Session Title: Presented Poster Session: Imaging

Venue: Poster Village: Pod 3

First Author: : M.Abdel Aziz EGYPT

Co Author(s): :                           

Abstract Details

Purpose:

To evaluate corneal flap symmetry in the central 3 mm for subjects underwent either LASIK or Femto- LASIK for correction of myopia and/ or astigmatism.

Setting:

ophthalmology department, Menoufia university hospital, Egypt.

Methods:

This study enrolled 160 eyes of 80 patients with mild to moderate myopia (less than - 6 D) as well as astigmatism less than -3.00 D. The corneal flaps of 80 eyes were created with the VisuMax femtosecond laser for intended thickness of 100 µm and the other 80 eyes flaps were created by Moria M2 microkeratome (90 µm head) with intended thickness of 90 µm. The flap thickness was measured with a spectral domain anterior segment optical coherence tomography (AS-OCT) system at five points (center ± 1.5 mm from the center) on each of the vertical and horizontal meridia

Results:

The mean central thicknesses of the VisuMax and Moria M2 flaps were 102.06 ± 5.37 and 130.25 ± 12.61 respectively (P <0.0001). In terms of mean flap thickness at each eccentricity, there were significant differences between the two groups, along the four measured eccentricities (P <0.0001).

Conclusions:

: Mean flap thickness measurements at each point showed more accurate outcomes in femtolaser group; moreover slight vertical as well as horizontal asymmetry exists in Moria group, although statistically insignificant.

Financial Disclosure:

None