研究目的
To evaluate the safety and effectiveness of femtosecond laser-assisted in situ keratomileusis (LASIK) in the treatment of residual myopia and astigmatism following femtosecond laser-enabled keratoplasty (FLEK).
研究成果
Femto-LASIK appears to be a safe and effective surgical option to correct residual refractive error from a prior FLEK, with significant improvements in UDVA, manifest refractive astigmatism, and spherical equivalent, and no surgical complications reported.
研究不足
Retrospective study with limited follow-up data; long-term stability of refractive outcomes beyond 12 months not assessed; direct differences in surgical outcomes between femto-LASIK after FLEK and femto-LASIK after conventional PK unknown.
1:Experimental Design and Method Selection:
Retrospective case review of patients who underwent femto-LASIK surgery after FLEK.
2:Sample Selection and Data Sources:
Chart review of 14 eyes in 13 patients with prior FLEK who underwent femto-LASIK surgery.
3:List of Experimental Equipment and Materials:
Femtosecond laser (IntraLase FS, Johnson & Johnson Surgical Vision), VISX Star S4 excimer laser (VISX, Santa Ana, CA), Pentacam (Oculus, Wetzlar, Germany), ATLAS (Carl Zeiss Meditec, Inc., Dublin, CA), Orbscan (Bausch & Lomb, Rochester, NY), IOLMaster (Carl Zeiss Meditec, Inc., Dublin, CA), CellChek XL (Konan, Irvine, CA).
4:Experimental Procedures and Operational Workflow:
Preoperative screening for refractive stability and ocular diseases, femto-LASIK surgery with femtosecond laser flap creation and excimer laser ablation, postoperative follow-up at standard intervals.
5:Data Analysis Methods:
Statistical analysis of UDVA, CDVA, manifest refractive astigmatism, and spherical equivalent using paired and unpaired t test analyses.
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ATLAS
ATLAS
Carl Zeiss Meditec, Inc.
Measuring corneal topography preoperatively and postoperatively.
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IOLMaster
IOLMaster
Carl Zeiss Meditec, Inc.
Measuring corneal topography preoperatively and postoperatively.
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IntraLase FS laser
IntraLase FS
Johnson & Johnson Surgical Vision
Creating precise and consistent incisions in host and donor corneas for FLEK and femto-LASIK surgeries.
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VISX Star S4 excimer laser
VISX Star S4
VISX
Ablating the stroma after separating and lifting the flap in femto-LASIK surgery.
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Pentacam
Pentacam
Oculus
Measuring corneal topography preoperatively and postoperatively.
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Orbscan
Orbscan
Bausch & Lomb
Measuring corneal topography preoperatively and postoperatively.
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CellChek XL
CellChek XL
Konan
Performing endothelial cell analysis using specular microscopy to determine graft health.
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