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Abstract
The purpose of this study was to elucidate, under which conditions abattoir-acquired pig eyes are suitable for refractive excimer laser experiments. Porcine eyes from tunnel-scalded (n = 5) and tank-scalded (n = 10) pigs were compared to unscalded eyes (n = 5) and to eyes scalded in the laboratory (n = 5). The corneal epithelium was removed before an excimer laser was used to perform a − 8.0 D photoablation. Corneal thickness was measured by optical coherence topography before and after photoablation. The ablation depth was determined with a contour measuring station, the morphology of the ablated areas was characterized by scanning electron microscopy and white-light profilometry. The scalded eyes showed an increase in corneal swelling which gained statistical significance in tank-scalded eyes showing a wedge-shaped opaque stromal lesion in the nasal corneal quadrant. A measurable deterioration of photoablation was only found in tank-scalded eyes that exhibited the opaque lesion. Ablated area morphology was smooth and regular in the unscalded and tunnel-scalded eyes. The tank-scalded eyes showed conspicuous wrinkles. While unscalded eyes should always be preferred for excimer laser laboratory experiments, the data suggest that the use of tunnel-scalded eyes may also be acceptable and should be chosen over tank-scalded eyes.
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1 Friedrich-Alexander University Erlangen-Nürnberg, Institute of Functional and Clinical Anatomy, Erlangen, Germany (GRID:grid.5330.5) (ISNI:0000 0001 2107 3311)
2 WaveLight GmbH, Erlangen, Germany (GRID:grid.467675.1) (ISNI:0000 0004 0629 4302)
3 Paracelsus Medical University, Department of Neurosurgery, Nürnberg, Germany (GRID:grid.467675.1)
4 Friedrich-Alexander University Erlangen-Nürnberg, Dental Clinic 1, Operative Dentistry and Periodontology, Erlangen, Germany (GRID:grid.5330.5) (ISNI:0000 0001 2107 3311)
5 Friedrich-Alexander University Erlangen-Nürnberg, Institute of Functional and Clinical Anatomy, Erlangen, Germany (GRID:grid.5330.5) (ISNI:0000 0001 2107 3311); Sechenov University, Department of Operative Surgery and Topographic Anatomy, Moscow, Russia (GRID:grid.448878.f) (ISNI:0000 0001 2288 8774)