scholarly journals Evaluation of Astigmatism-Correcting Efficiency and Rotational Stability after Cataract Surgery with a Double-Loop Haptic Toric Intraocular Lens: A 1-Year Follow-Up

2021 ◽  
pp. 30-41
Author(s):  
Ladislav Viktor Nováček ◽  
Marie Němcová ◽  
Kateřina Tyx ◽  
Kristýna Lahodová ◽  
Leoš Rejmont ◽  
...  
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Medical Engineering ◽  
Rotational Stability ◽  
Toric Intraocular Lens ◽  
Refractive Outcomes ◽  
Astigmatism Correction ◽  
Cataract Patients

Objectives: The aim of this study was to assess the clinical outcomes, predictability of results, efficiency of astigmatism correction, and rotational stability of the Bi-Flex 677TAY (Medicontur Medical Engineering Ltd., Zsámbék, Hungary) monofocal toric intraocular lens (IOL) designed for cataract patients with astigmatism. Methods: The IOLs were implanted either mono- or binocularly, following routine cataract surgery. Visual and refractive outcomes, as well as off-axis rotation were assessed throughout a 1-year follow-up period. All clinical data for this work were collected retrospectively. Vector analysis based on the Alpins method was performed to assess the efficiency of astigmatism correction. Results: No complications or adverse events occurred during surgery or the follow-up period. IOL implantation brought 88% of eyes into the ±0.50 D, and 100% into the ± 1.00 D range compared to the target spherical equivalent refraction, emmetropia. Astigmatism correction brought similar results: 94% of eyes had a residual cylindrical error of not higher than ±0.50 D, and 97% were within ±1.00 D. Vector analysis resulted in a correction index of 0.96 and a difference vector of 0.17. Both refractive and visual outcomes showed long-term stability. During the 12-month follow-up period, no eyes had a rotation of >5°. Absolute rotation after 1 year was 1.42 ± 1.89° (median = 0°), while signed rotation was 1.06 ± 2.12° (median = 0°). Conclusion: The Bi-Flex 677TAY monofocal toric IOL, designed by Medicontur Medical Engineering Ltd., represents an efficient and safe solution for cataract patients with astigmatism. Clinical and refractive outcomes are predictable, and rotational stability ensures long-term visual comfort.

scholarly journals Long-term changes in the refractive effect of a toric intraocular lens on astigmatism correction

2021 ◽  
Author(s):  
Ken Hayashi ◽  
Motoaki Yoshida ◽  
Shunsuke Hayashi ◽  
Akira Hirata
Keyword(s):  
Intraocular Lens ◽  
Marked Change ◽  
Corneal Astigmatism ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Time Points ◽  
Astigmatism Correction ◽  
Ocular Residual Astigmatism ◽  
Long Term Changes

Abstract Purpose To examine the long-term changes in the astigmatism-correcting effect of a toric intraocular lens (IOL) after stabilization of surgically induced astigmatic changes due to cataract surgery. Methods Unilateral eyes of 120 patients that received a toric IOL for against-the-rule (ATR) or with-the-rule (WTR) astigmatism were enrolled. Manifest refractive and anterior corneal astigmatism, and ocular residual astigmatism which is mainly derived from internal optics were examined preoperatively, at approximately 2 months postoperatively (baseline) and at 5 ~ 10 years postbaseline. The astigmatism was decomposed to vertical/horizontal (Rx) and oblique components (Ry), which was compared between baseline and 5 ~ 10 years postbaseline. Results In the eyes having ATR astigmatism, the mean Rx and Ry of the manifest refractive and corneal astigmatism significantly changed toward ATR astigmatism between the baseline and 5 ~ 10 years postbaseline (p ≤ 0.0304), but those of ocular residual astigmatism did not change significantly between the 2 time points. In the eyes having WTR astigmatism, the Rx and Ry of refractive, corneal, and ocular residual astigmatism did not change significantly between the 2 time points. Double-angle plots revealed an ATR shift in refractive and corneal astigmatism and no marked change in the ocular residual astigmatism in the eyes with ATR astigmatism, and there is no change in this astigmatism in the eyes with WTR astigmatism. Conclusion The long-term changes with age in the effect of a toric IOL significantly deteriorated due to an ATR shift of corneal astigmatism in the eyes having ATR astigmatism, while it was maintained in eyes having WTR astigmatism, suggesting that ATR astigmatism should be overcorrected.

scholarly journals Comparison of penetrating femtosecond laser-assisted astigmatic keratotomy and toric intraocular lens implantation for correction of astigmatism in cataract surgery

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hoon Noh ◽  
Young-Sik Yoo ◽  
Kyoung Yoon Shin ◽  
Dong Hui Lim ◽  
Tae-Young Chung
Keyword(s):  
Femtosecond Laser ◽  
Cataract Surgery ◽  
Intraocular Lens ◽  
Safe Procedure ◽  
Toric Intraocular Lens ◽  
Toric Iol ◽  
Iol Implantation ◽  
Astigmatism Correction ◽  
Correction Of Astigmatism ◽  
Astigmatic Keratotomy

AbstractThis study tried to compare the clinical outcomes of femtosecond laser-assisted astigmatic keratotomy (FSAK) and toric intraocular lens (IOL) implantation for astigmatism correction and identify factors affecting the efficacy of FSAK and toric IOL implantation in astigmatism correction. This retrospective case series comprised patients with corneal astigmatism ranging between 0.5 D and 4.5 D. Patients underwent FSAK or toric IOL implantation for cataract treatment and correction of astigmatism at the Samsung Medical Center, a tertiary surgical center, between April 2016 and December 2018. All patients underwent examination before and at three months after the surgery for comparative evaluation of refractive astigmatism, corneal high order aberrations and irregularity index. The astigmatism correction was analyzed by the Alpins method. Subgroup analysis of preoperative factors was based on the extent of target-induced astigmatism (TIA), the degree of astigmatism, and astigmatism classification based on topography. Thirty-one eyes underwent toric IOL implantation and 35 eyes underwent FSAK. The refractive astigmatism was significantly decreased in both toric IOL (P = 0.000) and FSAK group (P = 0.003). The correction index (CI) of refractive astigmatism was 0.84 ± 0.39 in the toric IOL and 0.71 ± 0.60 in the FSAK group. There was no difference between the two groups (P = 0.337). The CI of the FSAK group was significantly lower than in the toric IOL group when TIA was more than 1.5 D (P = 0.006), when correcting against-the-rule (P = 0.017), and limbus-to-limbus astigmatism (P = 0.008). In conclusion, toric IOL implantation is an effective and safe procedure for correcting preoperative astigmatism in cataract surgery in the short-term observation.

scholarly journals Toric Intraocular Lens for Astigmatism Correction in Cataract Patients

2017 ◽  
Vol 6 (1) ◽  
pp. 123 ◽  
Author(s):  
AzadehMohammadi Milasi ◽  
Hassan Razmjoo ◽  
Mohammad Ghoreishi ◽  
Alireza Peyman ◽  
Zahra Jafarzadeh ◽  
...  
Keyword(s):  
Intraocular Lens ◽  
Toric Intraocular Lens ◽  
Astigmatism Correction ◽  
Cataract Patients

Cataract surgery with intraocular lens implantation in 3 brothers with megalocornea: Long-term follow-up

2018 ◽  
Vol 44 (3) ◽  
pp. 399-402 ◽  
Author(s):  
Marco Messina ◽  
Andrew R. Ross ◽  
Giulio Pocobelli ◽  
Dalia G. Said ◽  
Harminder S. Dua
Keyword(s):  
Cataract Surgery ◽  
Intraocular Lens ◽  
Intraocular Lens Implantation ◽  
Lens Implantation ◽  
Long Term Follow Up
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