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First clinical outcomes with a new trifocal toric lens

Poster Details

First Author: P.Mojžiš CZECH REPUBLIC

Co Author(s):    P. Peña-Garcia   K. Majerová   L. Kukuckova   J. Alió     

Abstract Details



Purpose:

To present first clinical experience following lens extraction and trifocal lens toric (AT LISAtri toric 939MP, Carl Zeiss Meditech) implantation

Setting:

Premium Clinic Teplice Czech Republic /Vissum Instituto de Oftalmológico de Alicante, Spain

Methods:

16 eyes of 8 patients were enrolled in this study group. All patients underwent uncomplicated suturless microincision phacoemulsification (1.8 mm). In all cases, trifocal toric AT LISAtri toric 939 MP lens was implanted. The following visual and refractive parameters preoperatively and postoperatively were measured and analyzed: sphere, cylinder, spherical equivalent, uncorrected and corrected distance (UDVA, CDVA), uncorrected, corrected and distance corrected intermediate visual acuity (UIVA,CIVA, DCIVA) at 66 and 80 cm uncorrected, corrected and distance corrected near visual acuity (UNVA, CNVA, DCNVA) at 33 and 40cm, corneal topography and aberrometry (OPD Scan III, Nidek). Postoperatively, photopic and mesopic contrast sensitivity and vector analysis using ASSORT software were performed. In addition, defocus curve was obtained to assess near and intermediate visual function. The following up period was 3 months.

Results:

No statistically significant changes were observed for keratometry K1 (42.68±1.98 vs 42.78±1.98, p=0.278), K2 (44.78±1.75 vs 44.79±1.71, p=0.753), corneal cylinder (2.03±0.83 vs 1.88±0.81, p=0.079). Significant improvement were reached for defocus interval (4.19±2.24 vs 0.64±0.46, p=0.001) and refractive cylinder (-1.80±1.48 vs -0.38±0.26, p=0.003), UDVA (p=0001), CDVA (p=0,046), UNVA (p=0.001, CNVA (p=0.002 ), DCNVA (p <0.001) at 33 cm, UNVA (<0.001), CNVA (p=0.015), DCNVA (p<0.001) at 40 cm, UIVA (p<0.001), DCIVA (0.005) at 66 cm, UIVA (p<0.001), DCIVA (0.001) at 80 cm. No significant changes were observed for CIVA at 66 (p=0.043) and at 80 cm (p=0.142). Comparing near VA at 33 cm vs 40 cm, there was significatly better values at 40 cm, UNVA at 33 cm (0.22±0.17) at 40 cm (0.15±0.09) (p=0.005), CNVA at 33 cm (0.18±0.08) at 40 cm (0.13±0.09) (p=0.021), DCNVA at 33 cm (0.23±0.07) at 40 cm (0.16±0.09) (p=0.003). Significant better values were obtained at 80 cm for CIVA (0.04±0.10) vs at 66 cm (0.08±0.13) (p=0.014) and DCIVA (0.06±0.09) vs at 66 cm (0.09±0.12) (p=0.014), the p value for UIVA was very close to the level of significance (p=0.058). Vector analysis showed the following results: TIA (1.76±1.37), SIA (1.78±1.25), DV (0.29±0.30), IS (0.22±0.35), AE (6.87±12.36), ME (0.15±0.20).

Conclusions:

This new trifocal toric IOL provides effective correction of corneal astigmatim and also improve near and distance vision in presbyopic patients. The main advantage of the trifocal design is the achievement of an intermediate focus. The Sperical equivalent correction index was 1.04±0.79 indicating perfect correction of preoperative refractive error. FINANCIAL INTEREST: NONE

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