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Evolution of visual acuity, flap thickness, and optical density after laser in situ keratomileusis performed with a femtosecond laser.
- Source :
-
Journal of cataract and refractive surgery [J Cataract Refract Surg] 2020 Feb; Vol. 46 (2), pp. 260-266. - Publication Year :
- 2020
-
Abstract
- Purpose: To describe the postoperative evolution of visual acuity, flap morphology, and stromal optical density femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK).<br />Setting: Clínica Rementería, Madrid, Spain.<br />Design: Prospective case series.<br />Methods: The study comprised 44 consecutive eyes that had FS-LASIK performed with the WaveLight FS200 and the Allegretto excimer laser to correct myopia. Visual outcomes, flap thickness, and stromal optical density were assessed 1 day, 1 week, 1 month, and 3 months postoperatively.<br />Results: A statistically significant improvement in the mean uncorrected distance visual acuity at 1 day (0.94 ± 0.2) and 1 week (0.93 ± 0.2) to 1 month (1.04 ± 0.2) and 3 months (1.11 ± 0.1) postoperatively (P < .05). At 3 months postoperatively, the femtosecond laser had good outcomes in efficacy (0.98 ± 0.1), safety (0.98 ± 0.1), and predictability (100% of eyes were within ± 0.5 D of emmetropia). The femtosecond-created flaps were slightly thicker than intended, the mean SD intraflap was 7.1 μm, the range between the thickest and thinnest points in each flap was 25.4 μm, and the mean flap thickness homogeneity was 7.6 μm at 3 months postoperatively. A progressive decrease in the optical density of the flap stroma and the residual stromal bed was detected during follow-up.<br />Conclusions: The femtosecond laser study appears to be a safe, effective, and predictable platform to obtain LASIK flaps. The flaps were planar and homogeneous but slightly thicker than intended. The optical density of the flap stroma was slightly higher at early follow-up and decreased over time.
- Subjects :
- Adult
Corneal Pachymetry
Corneal Stroma surgery
Female
Humans
Male
Middle Aged
Myopia physiopathology
Organ Size
Prospective Studies
Refraction, Ocular physiology
Tomography, Optical Coherence
Treatment Outcome
Young Adult
Keratomileusis, Laser In Situ methods
Lasers, Excimer therapeutic use
Myopia surgery
Surgical Flaps pathology
Visual Acuity physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1873-4502
- Volume :
- 46
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Journal of cataract and refractive surgery
- Publication Type :
- Academic Journal
- Accession number :
- 32126040
- Full Text :
- https://doi.org/10.1097/j.jcrs.0000000000000008