Anterior Segment Optical Coherence Tomography Assessment of Stromal Pocket and Opaque Bubble Layer in Femtosecond Laser Assisted Laser In Situ Keratomileusis

K���MEN, Raciha Beril; DIN�, Umut Asli; YENEREL, Nursal Melda; G�RG�N, Ebru; �IFT�I, Ferda
September 2012
Glokom-Katarakt/Journal of Glaucoma-Cataract;Sep2012, Vol. 7 Issue 3, p159
Academic Journal
Purpose: To analyze the stromal pocket and opaque bubble layer (OBL) formation during femtosecond laser flap creation using the anterior segment optical coherence tomography (AS-OCT). Materials and Methods: During femtosecond laser assisted laser in situ keratomileusis (LASIK), 20 eyes of 10 patients were examined prospectively by AS-OCT to evaluate the flap-OBL-pocket relations immediately after flap creation. High resolution corneal images in four quadrants were recorded and analyzed using the software's flap tool. Results: The mean age of the patients (3 women, 7 men) was 42.0>6.2 years. 6.2 years. No preoperative or postoperative complications were observed. An OBL was observed in 10 eyes without pocket formation; the mean OBL thickness was 251 �m, and the mean OBL depth was 393.8 �m. Pocket formation was programmed to be performed on 10 eyes; it was rudimentary and could hardly be detected in 3 eyes by AS-OCT. In eyes containing stromal pocket, a lower amount of OBL was also found to expand to the limbus. The mean pocket thickness was 85 �m and the mean pocket depth was 301.2 �m. Conclusion: AS-OCT is a useful tool to evaluate the flap-OBL-pocket relations in vivo immediately after femtosecond laser during LASIK procedures. The presence of flap related stromal pockets significantly decrease OBL formation in femtosecond laser assisted LASIK.


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