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. 2016 Jan 19:10:151-9.
doi: 10.2147/OPTH.S91298. eCollection 2016.

Astigmatism management in cataract surgery with Precizon(®) toric intraocular lens: a prospective study

Carolina Vale  1 , Carlos Menezes  2 , J Firmino-Machado  3 , Pedro Rodrigues  2 , Miguel Lume  1 , Paula Tenedório  2 , Pedro Menéres  1 , Maria do Céu Brochado  1
Affiliations

Astigmatism management in cataract surgery with Precizon(®) toric intraocular lens: a prospective study

Carolina Vale et al. Clin Ophthalmol. .

Abstract

Purpose: The purpose of this study was to evaluate the visual and refractive outcomes and rotational stability of the new aspheric Precizon(®) toric intraocular lens (IOL) for the correction of corneal astigmatism in cataract surgery.

Setting: Department of Ophthalmology, Hospital Geral de Santo António - Centro Hospitalar do Porto, EPE and Hospital de Pedro Hispano, Matosinhos, Portugal.

Design: This was a prospective clinical study.

Patients and methods: A total of 40 eyes of 27 patients with corneal astigmatism greater than 1.0 diopter (D) underwent cataract surgery with implantation of Precizon(®) toric IOL. IOL power calculation was performed using optical coherence biometry (IOLMaster(®)). Outcomes of uncorrected (UDVA) and best-spectacle corrected distance visual acuities (BCDVA), refraction, and IOL rotation were analyzed at the 1st week, 1st, 3rd, and 6th month's evaluations.

Results: The median postoperative UDVA was better than preoperative best-spectacle corrected distance visual acuity (0.02 [0.06] logMAR vs 0.19 [0.20] logMAR, P<0.001). At 6 months, postoperative UDVA was 0.1 logMAR or better in 95% of the eyes. At last follow-up, the mean spherical equivalent was reduced from -3.35±3.10 D to -0.02±0.30 D (P<0.001) with 97.5% of the eyes within ±0.50 D of emmetropia. The mean preoperative keratometric cylinder was 2.34±0.95 D and the mean postoperative refractive cylinder was 0.24±0.27 D (P<0.001). The mean IOL rotation was 2.43°±1.55°. None of the IOLs required realignment.

Conclusion: Precizon(®) toric IOL revealed very good rotational stability and performance regarding predictability, efficacy, and safety in the correction of preexisting regular corneal astigmatism associated with cataract surgery.

Keywords: astigmatism; cataract surgery; implantation outcomes; stability; toric intraocular lens.

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Figures

Figure 1
Figure 1
Postoperative digital analysis of Precizon® toric IOL rotation. Abbreviation: IOL, intraocular lens.
Figure 2
Figure 2
Cumulative postoperative distance visual acuities (UDVA – uncorrected; BCDVA – best-spectacle corrected) at 6 months evaluation (6 m) (n=40 eyes).
Figure 3
Figure 3
Astigmatism shift during the follow-up in all 40 eyes implanted with Precizon® toric IOL during cataract surgery. Abbreviations: IOL, intraocular lens; Preop, preoperative; w, week; m, month.
Figure 4
Figure 4
Single-angle polar plots for the target-induced astigmatism (TIA) vector at 6 months follow-up. Abbreviations: Arith mean, arithmetic mean; Ax, Axis.
Figure 5
Figure 5
Single-angle polar plots for the surgically-induced astigmatism (SIA) vector at 6 months follow-up. Abbreviations: Arith mean, arithmetic mean; Ax, Axis.
Figure 6
Figure 6
Absolute IOL rotation between observation periods in all 40 eyes implanted with Precizon® toric IOL during cataract surgery. Abbreviations: IOL, intraocular lens; w, week; m, month.
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