Experimental circular keratotomy for correction of corneal astigmatism.

Autor: Wijdh RH; Department of Ophthalmology, University Hospital Groningen, The Netherlands., van Rij G
Jazyk: angličtina
Zdroj: Journal of refractive surgery (Thorofare, N.J. : 1995) [J Refract Surg] 1998 Nov-Dec; Vol. 14 (6), pp. 594-6.
DOI: 10.3928/1081-597X-19981101-04
Abstrakt: Purpose: To investigate the effect of circular keratotomy depth and diameter on corneal astigmatism.
Methods: High astigmatism was induced in 25 human donor eyes by an anterior radial 7-0 silk suture across the corneoscleral limbus. With a 6.0, 6.5, 7.0, or 7.5 mm trephine, a 0.3 mm deep circular incision was made in 20 donor eyes. In 5 donor eyes 5 circular incisions were made with a diamond knife set at 0.1, 0.2, 0.3, 0.4, and 0.5 mm depths.
Results: The reduction of astigmatism between the 4 groups in which different trephination diameters were used showed no statistically significant difference (P > .1). The relationship between incision depth and reduction of astigmatism was statistically significant (P < .001).
Conclusion: Artificially induced corneal astigmatism was reduced by a circular keratotomy in this donor eye model. Deeper incisions showed a greater effect.
Databáze: MEDLINE