Surgically-induced astigmatism after laser in situ keratomileusis for spherical myopia.
J Refract Surg
; 16(5): 515-8, 2000.
Article
en En
| MEDLINE
| ID: mdl-11019865
ABSTRACT
PURPOSE:
To characterize the surgically-induced-astigmatism (SIA) associated with spherical LASIK.METHODS:
Refractive outcomes in 70 eyes that underwent primary myopic LASIK with purely spherical ablation were analyzed. The Summit Apex Plus excimer laser was used. The Bausch & Lomb Hansatome with the 180-microm plate was used to produce superiorly hinged flaps. The relationship between refractive astigmatism and corneal topographic astigmatism was analyzed using linear regression and vector analysis.RESULTS:
There was a statistically significant negative correlation (slope = -0.21) between refractive surgically-induced astigmatism and preoperative topographic cylinder. A 0.24-D with-the-rule shift was also found. Surgically-induced astigmatism was not correlated with the magnitude of laser ablation.CONCLUSION:
The lamellar keratotomy portion of LASIK reduces pre-existing corneal astigmatism and produces a relative steepening of the hinge meridian.
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Banco de datos:
MEDLINE
Asunto principal:
Astigmatismo
/
Córnea
/
Queratomileusis por Láser In Situ
/
Miopía
Tipo de estudio:
Diagnostic_studies
Límite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Refract Surg
Asunto de la revista:
OFTALMOLOGIA
Año:
2000
Tipo del documento:
Article
País de afiliación:
Estados Unidos