Opposite Clear Corneal Incisions versus Steep Meridian Incision Phacoemulsification for Correction of Pre-existing Astigmatism
| Autor: | Noushin Bazzazi, Behzad Barazandeh, Mani Kashani, Maryam Rasouli |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Journal of Ophthalmic & Vision Research, Vol 3, Iss 2, Pp 87-90 (2008) |
| Druh dokumentu: | article |
| ISSN: | 2008-2010 2008-322X |
| Popis: | PURPOSE: To compare the efficacy of adding an opposite clear corneal incision (OCCI) on the steep meridian versus performing surgery on the steep meridian alone during phacoemulsification in reducing pre-existing corneal astigmatism. METHODS: This randomized clinical trial was performed on 120 eyes with corneal astigmatism of > 1D undergoing phacoemulsification. Incisions were made based on the type of astigmatism as follows: superior or superior + OCCI for with-the-rule and temporal or temporal + OCCI for against-the-rule astigmatism. Patients were followed with refraction, keratometry and topography. Statistical analysis was performed using one- and two-way ANOVA and Tukey-a test. RESULTS: Mean corneal astigmatism was 1.82±0.86 D in the superior + OCCI group and 1.74±0.86 D in the temporal + OCCI group preoperatively which decreased to 1.31±0.59 (P=0.013) and 1.19±0.64 (P=0.009) postoperatively respectively. No significant change occurred in the amount of astigmatism in any of the two single incision groups. CONCLUSION: Paired OCCI on the steep axis is a useful technique to correct mild to moderate pre-existing astigmatism with no need for particular skill or additional instruments. |
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