Comparison Between The Sbk Microkeratome Versus Femtosecond Laser In Flap Creation During Lasik Surgery For Myopia
Published 2023 - 41st Congress of the ESCRS
Reference: PP09.03 | Type: Free paper | DOI: 10.82333/gd0f-x663
Authors: Mona Medhat 1 , Mohamed Hosny* 1 , Rania Sobhi 1 , Hanan ElGhonemy 2 , Yehia Salah Mostafa 1
1Ophthalmology,Kasr Al Ainy Cairo University,Cairo,Egypt, 2Ophthalmology,Memorial Institute of Ophthalmic Research,Cairo,Egypt
Purpose
Comparison between the SBK microkeratome versus Femtosecond laser in flap creation during LASIK surgery for myopia.
Design: Prospective comparative non randomized interventional clinical study.
Key words:
Corneal Flap Thickness, Hinge Size, Flap Diameter, Side Cut Angle, Sub-Bowman Keratomileusis, Femtosecond laser, Myopia, Astigmatism.
Setting
Study on SBK Group was performed in EyeCare Center Maadi, Cairo
Study on FS-200 Femtosecond laser group was performed in Dar El Oyoun, Rofayda Medical Complex, Sheikh Zayed, Giza
Methods
Study incuded 60 eyes of 30 patients in each group (SBK, FS200 laser group). Flaps were created in the FS laser group using the Wave Light FS200 femtosecond laser, and Moria SBK microkeratome (Moria SA, Antony, France) in the SBK group. AS-OCT was used 1 month postoperatively to evaluate the thickness of 5 points across each flap, which were 0, 1.5 mm to the corneal vertex on the horizontal and vertical meridians. Hinge size and flap diameter were measured using caliper one month after surgery. Any related complications were recorded. For side-cut angles, scans were done across the temporal side of the flap, and then images were transferred to Draw editor software, measurements were recorded and analyzed 1 month after surgery using AS-OCT.
Results
The mean achieved central corneal flap thickness in both eyes in FS200 laser group was 117.4µ ± 4.18, and 84.90µ ± 3.74 in the SBK group, which was statistically significant (p <0.05). The mean achieved Hinge size in both eyes in FS200 laser group was 3.47mm ±0.26, and 4.81mm ±0.63 (p <0.05) in the Moria SBK group. The mean achieved flap diameter in FS200 laser group was 7.95mm±0.43, and 9.15mm±0.21 in SBK group (p <0.05). The mean achieved side cut angle in FS200 laser group 126.93º±9.56, and 37.18º±6.93 in SBK group (p<0.05).
Conclusions
There was a statistically significant difference between the intended and the achieved side cut angles between both study groups. Flap thickness was more predictable in FS200 laser group compared to SBK group. There were reported complications in the SBK group, while Femtosecond laser technology has shown better postoperative flap uniformity with no reported complications.
Key words:
Corneal Flap Thickness, Hinge Size, Flap Diameter, Side Cut Angle, Sub-Bowman Keratomileusis, Femtosecond laser, Myopia, Astigmatism.