Morphology, Accuracy, and Histology of Corneal Flap Cuts Using a 200 kHz Femtosecond Laser. R. Khoramnia C.P. Lohmann J. Salgado C. Winkler von Mohrenfels. ASCRS 2010. Augenklinik, Klinikum rechts der Isar, Technische Universität München , Munich, Germany
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C. Winkler von Mohrenfels
Augenklinik, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
All authors have no financial interest in the subject matter of this poster.
The laser system used is not FDA approved and does not yet have a CE mark.
We analyzed flaps created with a prototype 200 kHz femtosecond laser (UltraFlap; WaveLight AG, Erlangen, Germany) concerning their cut accuracy, morphology, and histology.
36 fresh porcine eyes: Epithelial abrasion
Femtosecond laser flap cutting using the 200 kHz femtosecond laser
-> Three thickness groups (100 µm, 130 µm, or 180 µm)
-> Flap diameters were varied ranging from 8.0 to 9.5 mm
1.) Flap diameters were measured with a sliding caliper.
2.) Flap thickness was measured with a micrometer gauge (Extramess 2000; Mahr, Esslingen, Germany). Accuracy of this device: 0.3 µm
3.) Histologic examination
Meanvalues: 96.33±7.45 134.67±4.96 174.59±9.35
Meanvalues: 8.03±0.15 8.03±0.15 9.09±0.10 9.54±0.15 mm
Histology showed a smooth cut with very little to almost no changes in the corneal structure.