Purpose: High postkeratoplasty astigmatism is a common postoperative complication which can limit the final functional result. Arcuate incisions are a possible surgical treatment. They can be performed with the arcuate keratome which provides regular incisions. The aim of this study was to evaluate the results obtained with this device in the correction of high postkeratoplasty astigmatism.
Methods: We retrospectively studied ten eyes operated for high postkeratoplasty astigmatism with the Hanna arcuate keratome. Arcuate keratomy procedures were performed on the graft button in all. Before surgery, mean uncorrected visual acuity was 0.07 +/- 0.05. Best spectacle-corrected visual acuity was 0.33 +/- 0.20 and mean subjective cylinder was 6.1 +/- 1.71 D.
Results: After one month postoperatively, the mean best spectacle-corrected visual acuity (0.45 +/- 0.20) was significantly improved (p < 5%) and mean subjective cylinder (2.85 +/- 1.29 D) was significantly decreased (p < 5%). Vector analysis showed a 5.59 D (+/- 3.63) mean astigmatism correction. Modifications of the spherical equivalent were not statistically significant. Astigmatism irregularity was not modified.
Conclusion: Arcuate keratotomy carried out with the Hanna arcuate keratome is effective in reducing high postkeratoplasty astigmatism. It is easier to perform than the standard manual technique. However, astigmatism correction predictibility should be improved.
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