Comparison of Toric Foldable Iris-Fixated Phakic Intraocular Lens Implantation and Limbal Relaxing Incisions for Moderate-to-High Myopic Astigmatism

作者：Lee Jeihoon; Lee Hun; Kang David Sung Yong; Choi Jin Young; Kim Eung Kweon; Kim Tae im^*

来源：Yonsei Medical Journal, 2016, 57(6): 1475-1481.

DOI：10.3349/ymj.2016.57.6.1475

• Lenses
• intraocular
• limbus corneae
• astigmatism

Purpose: To compare the effectiveness of toric foldable iris-fixated phakic intraocular lens (pIOL) implantation and non-toric foldable iris-fixated pIOL implantation with limbal relaxing incisions (LRIs) for correcting moderate-to-high astigmatism in myopic eyes.
Materials and Methods: The medical records of 146 patients (195 eyes) with myopic astigmatism who underwent toric foldable iris-fixated pIOL implantation (toric group; 94 eyes) or non-toric foldable iris-fixated pIOL implantation with concurrent LRIs (LRI group; 101 eyes) were retrospectively reviewed. For subgroup analysis, the two groups were subdivided according to preoperative astigmatic severity [moderate, 2.00 to <3.00 diopters (D); high, 3.00-4.00 D]. Visual and astigmatic outcomes were compared 6 months postoperatively.
Results: The uncorrected distance visual acuity was at least 20/25 in 100% and 98% of the toric and LRI group eyes, respectively. The toric group had lower mean residual cylindrical error (-0.67 +/- 0.39 D vs. -1.14 +/- 0.56 D; p<0.001) and greater mean cylindrical error change (2.17 +/- 0.56 D vs. 1.63 +/- 0.72 D; p<0.001) than the LRI group, regardless of the preoperative astigmatic severity. The mean correction index (1.10 +/- 0.16 vs. 0.72 +/- 0.24; p<0.001) and success index (0.24 +/- 0.14 vs. 0.42 +/- 0.21; p<0.001) also differed significantly between the groups.
Conclusion: Both surgical techniques considerably reduced astigmatism and had comparable visual outcomes. However, toric foldable iris-fixated pIOL implantation was more reliable for correcting moderate-to-high astigmatism in myopic eyes.

• 出版日期2016-11