| Autor: |
Serge Rosolen, Danièle S. Aron-Rosa, Michel Gross, S. Ganem |
| Rok vydání: |
1994 |
| Předmět: |
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| Zdroj: |
Journal of Refractive Surgery. 10:575-581 |
| ISSN: |
1081-597X |
| DOI: |
10.3928/1081-597x-19940901-18 |
| Popis: |
BACKGROUND: We designed an excimer laser keratomileusis delivery system to increase the regularity of the refractive cut surface and allow greater precision in the level and shape of the ablated zone. METHODS: A parallel faced corneal disc was produced by microkeratectomy from six human eyes and surgical keratectomy in 12 beagle corneas. A 193-nanometer excimer laser that was used to project an oval beam onto the corneal disc was rotated on a flat surface to ensure overlapping of the ovally ablated areas between pulses. RESULTS: Electron microscopy of eye bank lenticules demonstrated a circular smooth regularly concave ablation zone. Histological examination of nine clear corneas confirmed thinning of the stroma without fibroblastic reaction and no epithelial hypertrophy. Mean preoperative corneal power of 43.15 ± 2.18 decreased postoperatively to 33.61 ±2.34. CONCLUSIONS: The new technique of excimer laser keratomileusis has the advantage of a cut surface smoother and the clear zone is devoid of the stepwise concavity and irregularity seen in diaphragm based photoablation delivery systems. [J Refract Corneal Surg. 1994;10:575-581.] |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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