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Decagonal trephination pattern suggested for penetrating keratoplasty
Am J Ophthalmol. 2011;151(1):29-34.
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A study suggested that the decagonal trephination pattern is safe and effective for penetrating keratoplasty with femtosecond laser.
The prospective, nonrandomized study consisted of 16 eyes of 16 patients that underwent decagonal penetrating keratoplasty and were evaluated at a mean follow-up of 9.75 ± 3.5 months for uncorrected visual acuity, best spectacle-corrected visual acuity, pachymetry, topography and endothelial cell density.
There were no intraoperative complications, and visual acuity and refractive results were encouraging when compared with those of previous studies on penetrating keratoplasty. Mean best spectacle-corrected visual acuity was 20/53 postop, and at 6 months, manifest astigmatism was 1.90 D.
According to the study authors, the reduced rotation of the graft in polygonal trephination enables accurate positioning and easies the process of suturing the graft into the recipient bed.
While results were promising, longer-term follow-up and comparative studies are needed to determine astigmatism reduction proportions for circular and decagonal trephination.