Artikel
Surgically-induced astigmatism after post-limbal and scleral tunnel incisions for the implantation of iris-fixated intraocular lenses
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Autoren
Veröffentlicht: | 22. September 2004 |
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Gliederung
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Objective
By varying the distance of the incision to the limbus, the surgical induced astigmatism after intraocular lens (IOL) implantation is influenced.
Methods
In a retrospective study, in 42 eyes of 23 patients (mean age: 35 years) iris-fixated IOLs (Artisan, Ophtec) with 6 mm optical diameter and mean power of -10.6 dpt (-6.5 to -15.5 dpt) were implanted. All implantations were performed through a 6 mm incision at 12 o'clock, either as posterior limbal incision, scleral tunnel incision with 0.5 - 0.75 mm or 1 - 2 mm distance to the limbus. After one month, we determined the amount of surgical induced astigmatism with the Holladay-Cravy-Koch formula, based on videokeratometric measurements. For statistical analysis the Kruskal-Wallis-test was used.
Results
The median amount of surgical induced astigmatism for the posterior limbal incision was 2.02 dpt (n=14), for scleral tunnel with 0.5 - 0.75 mm distance to the limbus 1.29 dpt (n=17) and for scleral tunnel with 1 - 2 mm distance 1.17 dpt (n=11).
Conclusions
In comparison to implantations of Artisan IOLs through posterior limbal incisions, surgical induced astigmatism can distinctly be reduced by implanting the IOL through scleral tunnel incision with 0.5 - 2 mm distance to the limbus.