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Visual performance of 2 aspheric toric intraocular lenses: comparative study
Antonio Scialdone1, Francesco De Gaetano, Gaspare Monaco
1From Ospedale Fatebenefratelli e Oftalmico, Milan, Italy.
Journal of Cataract and Refractive Surgery
|May 22, 2013
Summary
This study found two aspheric toric intraocular lenses (IOLs) offer similar visual outcomes and astigmatism correction. One IOL (Group A) resulted in better emmetropia, while the other (Group B) reduced spherical aberration.
Area of Science:
- Ophthalmology
- Biomedical Engineering
- Optics
Background:
- Cataract surgery requires precise intraocular lens (IOL) implantation for optimal visual outcomes.
- Aspheric toric IOLs aim to correct both refractive error and astigmatism, improving visual quality.
- Comparing the performance of different IOL models is crucial for clinical decision-making.
Purpose of the Study:
- To compare the visual and aberrometric results of two distinct aspheric toric intraocular lenses (IOLs).
- To evaluate the efficacy of Acrysof SN6AT IOL versus AT Torbi 709M IOL in astigmatic patients undergoing cataract surgery.
Main Methods:
- A prospective randomized comparative study was conducted involving 72 eyes of astigmatic patients.
- Patients received either an Acrysof SN6AT IOL (Group A) or an AT Torbi 709M IOL (Group B).
- Postoperative evaluations at 3 months included uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refractive astigmatism, spherical equivalent (SE), IOL misalignment, and optical quality.
Main Results:
- No significant differences were observed in UDVA, CDVA, residual astigmatism, or higher-order aberrations between the two IOL groups.
- Both IOLs demonstrated high accuracy in astigmatism correction, with 94.4% of eyes within ±0.50 diopters.
- Group A IOLs were closer to emmetropia (P=.01), while Group B IOLs exhibited significantly less spherical aberration (Z(4,0)).
Conclusions:
- Both aspheric toric IOLs provide comparable clinical effectiveness for astigmatism correction and rotational stability.
- The Acrysof SN6AT IOL (Group A) achieved outcomes closer to emmetropia.
- The AT Torbi 709M IOL (Group B) demonstrated a significant reduction in induced spherical aberration.
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