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Thresholds for interface haze formation after thin-flap femtosecond laser in situ keratomileusis for myopia
Karolinne Maia Rocha1, Roman Kagan, Scott D Smith
1Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio 44195, USA. karolinnemaia@hotmail.com
Purpose:
To evaluate the risk factors for interface haze formation after thin-flap femtosecond laser--laser in situ keratomileusis (LASIK).
Design:
Prospective case series.
Methods:
One hundred and ninety-nine consecutive eyes that underwent femtosecond laser LASIK with a LADAR 4000 excimer laser (Alcon Laboratories, Fort Worth, Texas, USA), were analyzed from January 1 to April 30, 2008. Treated eyes were divided into 2 groups according to desired flap thickness: 90 microm (106 eyes), and 100 to 110 microm (93 eyes). Cycloplegic refraction, spherical equivalent (SE), uncorrected visual acuity, best spectacle-corrected visual acuity (BSCVA), depth of ablation, central corneal thickness, flap thickness (optical coherence tomography), Scheimpflug images (Pentacam; Oculus Inc, Lynnwood, Washington, USA), and light scattering were assessed in all eyes that developed haze postoperatively.
Results:
Haze was observed in 32 eyes treated for moderate to high myopia (SE -6.23 +/- 1.67 diopters and depth of ablation 94.6 +/- 22.9 microm) at 3 months postoperatively. Ultra-thin IntraLASIK flaps (
Conclusion:
Interface haze is associated with an ultra-thin femtosecond laser flap setting of 90 microm and younger age among eyes following LASIK for myopia.
