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Femtosecond lasers ‘easily perform’ LASIK flap cuts

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LASIK flaps created with a femtosecond laser are “precise and accurate,” according to an analysis of the morphology, accuracy and histopathology of corneal flap cuts.

Members of the Heidelberg Intraocular Lenses and Refractive Surgery Research Group created femtosecond laser flaps on 45 porcine cadaveric eyes. The eyes were assigned to three different thickness groups (120-, 140- or 180-µm) cut depth. Different flap diameters ranging from 8 to 9.5 mm and rim edge angulations between 60° and 90° were performed.

All flap cuts were easily performed without complications. Flap thicknesses averaged 110.5 µm (for an intended 120 µm), 142.5 µm (for an intended 140 µm) and 180 µm (for an intended 180 µm). Flap diameter was within a range of 0.4 mm and histopathology revealed almost no changes in the stromal structure of the cornea and correct hinge angulations.

The study is published in the July issue of Investigative Ophthalmology & Visual Science.