PURPOSE: To demonstrate efficacy of a smoothing technique to increase regularity of the anterior corneal surface after photorefractive keratectomy (PRK), using two different excimer lasers. METHODS: Spherical ablations of -10.00 D were performed on 11 fresh porcine corneas using either the Technolas Keracor 217C scanning-spot or the Nidek EC-5000 scanning-slit beam excimer laser. Following the procedure, we performed a phototherapeutic keratectomy treatment (smoothing technique) on half of the corneal surface. The smoothing technique-was performed using a viscous solution of 0.25% sodium hyaluronate, which was spread on the cornea-prior to the procedure. The ablation zone was 6 mm in diameter and the transition zone extended to 3 mm. The ablation depth was set at 10 μm. Corneas were then examined with scanning electron microscopy. RESULTS: Smoother treatment zones were apparent in porcine corneas in which smoothing was performed following PRK, with both laser systems. Results from the two lasers were not directly compared. CONCLUSIONS: The smoothing procedure performed following PRK using a viscous 0.25% sodium hypluronate masking solution and a scanning laser system rendered the porcine corneal surface more regular.
|Number of pages||4|
|Journal||Journal of Refractive Surgery|
|Publication status||Published - Sep 2004|
ASJC Scopus subject areas