Myopic keratomileusis by excimer laser on a lathe.
J Refract Corneal Surg
; 10(5): 575-81, 1994.
Article
em En
| MEDLINE
| ID: mdl-7530109
ABSTRACT
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Transplante de Córnea
/
Terapia a Laser
/
Miopia
Limite:
Animals
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
J Refract Corneal Surg
Assunto da revista:
OFTALMOLOGIA
Ano de publicação:
1994
Tipo de documento:
Article
País de afiliação:
França