Comparison of Toric Foldable Iris-Fixated Phakic Intraocular Lens Implantation and Limbal Relaxing Incisions for Moderate-to-High Myopic Astigmatism.
10.3349/ymj.2016.57.6.1475
- Author:
Jeihoon LEE
1
;
Hun LEE
;
David Sung Yong KANG
;
Jin Young CHOI
;
Eung Kweon KIM
;
Tae Im KIM
Author Information
1. The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. tikim@yuhs.ac
- Publication Type:Original Article
- Keywords:
Lenses;
intraocular;
limbus corneae;
astigmatism
- MeSH:
Astigmatism*;
Humans;
Limbus Corneae;
Medical Records;
Phakic Intraocular Lenses*;
Retrospective Studies;
Visual Acuity
- From:Yonsei Medical Journal
2016;57(6):1475-1481
- CountryRepublic of Korea
- Language:English
-
Abstract:
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.
