Visual Outcomes and Rotational Stability of a Single- Piece Hydrophilic Monofocal Toric Intraocular Lens
DOI:
https://doi.org/10.48560/rspo.37680Keywords:
Astigmatism, Cataract Extraction, Lens Implantation, Intraocular, Lenses, IntraocularAbstract
INTRODUCTION: Corneal astigmatism greater than 1.5 diopters is a common refractive error present in approximately 15% to 22% of patients scheduled for cataract surgery. If not corrected, it will cause residual refractive astigmatism and spectacle dependence. Toric intraocular lenses allow the correction of astigmatism during cataract surgery. The purpose of this study is to assess the visual outcome and rotational stability of a single-piece hydrophilic monofocal toric intraocular lens after cataract surgery in patients with preexisting corneal astigmatism.
METHODS: In this prospective clinical study, a total of 117 eyes were implanted with RayOne® toric intraocular lenses after phacoemulsification surgery at Unidade Local de Saúde de Matosinhos in Matosinhos, Portugal, between September 2022 and March 2024. Patients with cataract and corneal astigmatism greater than 1.5 diopters measured with the IOLMaster 700® were included. Calculations of the intraocular lens power and axis placement were performed using the intraocular lens manufacturer's online calculator (Raytrace®). Outcomes of uncorrected, best corrected visual acuities and refractive status were analyzed at 1 and 6 months postoperatively. Intraocular lens rotation and posterior capsule opacification were evaluated at 6 months postoperatively.
RESULTS: The median postoperatively uncorrected visual acuity improved compared to the median of preoperative best corrected visual acuity (0.00 (0.10) logMAR vs 0.30 (0.3) logMAR, p<0.001). The mean preoperative keratometric cylinder was 2.80±1.22 diopters (range 1.50-8.18) and the mean postoperative refractive cylinder was 0.68±0.50 diopters (range 0.00-2.50 D) (p<0.001). A mean rotation relative to the intended axis of 1.41º±2.22º (range 0º-10º) was recorded at 6 months. At the last follow-up, 94.6% of the eyes showed no signs of posterior capsule opacification.
CONCLUSION: Toric intraocular lens implantation can provide spectacle independence for distance vision and is becoming increasingly significant in modern cataract surgery. RayOne® toric intraocular lens implantation after cataract surgery was stable and effective in correcting preexisting regular corneal astigmatism.
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