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Journal List > J Korean Ophthalmol Soc > v.55(8) > 1009744

Kim, Yu, Koo, Lee, Lee, and Park: Clinical Outcomes of Diffractive Multifocal Toric Intraocular Lens Implantation

Abstract

Purpose

To evaluate the clinical outcomes of patients with diffractive multifocal toric intraocular lens (IOL) implantation.

Methods

Thirty-four eyes of 26 patients underwent diffractive multifocal toric IOL. Uncorrected visual acuity (UCVA) at distant, intermediate and near and residual refractive astigmatism were measured on the first day, at 2 weeks, and 1, 3 and 6 months postoperatively. Optical quality obtained using the Optical Quality Analysis System II (OQAS II), high-order aberrations (HOA) and patient satisfaction questionnaire were evaluated 3 months postoperatively.

Results

At the 6 month postoperative visit, the mean UCVA at distant, intermediate (63 cm, 100 cm) and near were 0.06 ± 0.07, 0.18 ± 0.11, 0.16 ± 0.12 and 0.03 ± 0.06 (log MAR), respectively. The refractive astigmatism decreased significantly from −1.66 ± 1.04 D to-0.54 ± 0.32 D at 6 months postoperatively (p< 0.01). The means of objective scatter index, modulation transfer function (MTF) cut-off value, Strehl ratio and pseudo-accommodation range measured by OQAS II were 1.33 ± 0.67, 37.24 ± 9.67 cdp, 0.22 ± 0.09 and 3.08 ± 0.53 D, respectively. HOA scores for 5 mm and 6 mm were 0.30 ± 0.09 and 0.49 ± 0.15, respectively; 82.3% of the patients were satisfied with the postoperative results, 79.4% of the patients reported they would recommend the procedure to others, and 14.7% of patients reported moderate or severe visual disturbance at night.

Conclusions

Implantation of a diffractive multifocal toric IOL in patients with cataract and corneal astigmatism provided excellent distant, intermediate, and near visual outcomes, good optical quality and high patient satisfaction.

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jkos-55-1139f1.tif
Figure 1.
The AcrySof® IQ Restor® diffractive multifocal toric intraocular lens.
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jkos-55-1139f2.tif
Figure 2.
An example of a patient's image quality with accommodation measured by optical quality analysis system II at post-op 3 months. The graph shows good optical quality at distant (0.0 D) and near (3.0 D). At the 3-month postoperative visit, the mean pseudo-accommodation range of total enrolled patients was 3.08 ± 0.53 D.
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jkos-55-1139f3.tif
Figure 3.
Satisfaction of the patients with the diffractive multifocal toric intraocular lens (IOL) (%).
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Table 1.
Patient demographics and clinical information
Parameter Values
Eyes (n) 34
Patients (n) 26
Sex (M:F) 12:14
Age (years) (range) 51.8 ± 5.5 (43-66)
UCDVA (log MAR) 0.77 ± 0.48
Spherical equivalent (diopter) (range) -3.57 ± 4.41 (2.00∼-11.75)
Mean astigmatism magnitude (diopter)
  Refractive* (range) -1.66 ± 1.04 (-0.50∼-4.00)
  Corneal (range) 1.21 ± 0.95 (0.50-3.50)
Mean D power (diopter) (range) 17.24 ± 4.42 (7.50-22.5)
IOL model (n)
  SND1T2 2
  SND1T3 16
  SND1T4 9
  SND1T5 7

Values are presented as mean ± SD unless otherwise indicated.

D = diopter; IOL = intraocular lens; UCDVA = uncorrected distant visual acuity.

* Obtained by autorefractometry;

Obtained by autorefractokeratometry.

Table 2.
Postoperative visual acuity over time after implantation of the Acrysof® IQ Restor® toric IOL
Post op 1 day 2 weeks 1 month 3 months 6 months
UCDVA (log MAR) 0.07 ± 0.10 0.06 ± 0.08 0.06 ± 0.10 0.07 ± 0.07 0.06 ± 0.07
BCDVA (log MAR) 0.01 ± 0.03 0.01 ± 0.03 0.01 ± 0.03 0.02 ± 0.04 0.01 ± 0.03
UNVA (log MAR) 0.08 ± 0.08 0.04 ± 0.08 0.04 ± 0.07 0.04 ± 0.06 0.03 ± 0.06
UIVA63 (log MAR) 0.22 ± 0.11 0.18 ± 0.09 0.18 ± 0.08 0.16 ± 0.09 0.18 ± 0.11
UIVA100 (log MAR) 0.23 ± 0.11 0.17 ± 0.12 0.13 ± 0.10 0.14 ± 0.11 0.16 ± 0.12

Values are presented as mean ± SD.

IOL = intraocular lens; UCDVA = uncorrected distance visual acuity; BCDVA = best corrected distance visual acuity; UNVA = uncorrected near visual acuity at 40 cm distance; UIVA63 = uncorrected intermediate visual acuity at 63 cm distance; UIVA100 = uncorrected intermediate visual acuity at 100 cm distance.

Table 3.
Cylinder refraction (Cyl) and spherical equivalent (SE) at pre op, post op 1 day, 2 weeks, 1, 3 and 6 months
Pre op 1 day 2 weeks 1 month 3 months 6 months p-value*
Cyl (D) -1.66 ± 1.04 -0.58 ± 0.40 -0.59 ± 0.41 -0.55 ± 0.40 -0.59 ± 0.22 -0.54 ± 0.32 <0.01
SE (D) -3.5 ± 4.41 -0.23 ± 0.45 -0.27 ± 0.37 -0.31 ± 0.32 -0.29 ± 0.37 -0.34 ± 0.35 <0.01

Values are presented as mean ± SD.

D = diopter.

* Mann-Whitney U-test.

Table 4.
Postoperative astigmatism analysis according to preoperative corneal astigmatism
Parameter Results
Preoperative refractive astigmatism (diopter) -1.66 ± 1.04
Corneal astigmatism (diopter) 1.21 ± 0.95
  WTR (n) 1.31 ± 0.60 (27)
  ATR(n) 0.89 ± 1.78 (7)
Postoperative refractive astigmatism (n)
  ±0.5 D (%) 22 (64.71)
  ±1.0 D (%) 34 (100)
Preoperative corneal astigmatism (WTR), n 27
Postoperative refractive astigmatism
 <±0.5 D (n, %) 18 (66.67)
 ≥±0.5 D (n, %) 9 (33.33)
  Overcorrected (ATR) (n, %) 7 (77.78)
  Undercorrected (WTR) (n, %) 2 (22.22)
Preoperative corneal astigmatism (ATR), n 7
Postoperative refractive astigmatism
  <±0.5 D (n, %) 4 (57.14)
  ≥±0.5 D (n, %) 3 (42.86)
  Overcorrected (WTR) (n, %) 0 (0)
  Undercorrected (ATR) (n, %) 3 (100)

Values are presented as mean ± SD unless otherwise indicated. D = diopter; WTR = with-the-rule; ATR = against-the-rule.

Table 5.
Optical quality parameters measured by optical quality analysis system (OQAS) II at post-op 3 months
Parameters OQAS values
OSI 1.33 ± 0.67
MTF cut-off value (cpd) 37.24 ± 9.67
Strehl ratio 0.22 ± 0.09

Values are presented as mean ± SD.

OSI = objective scatter index; MTF = modulation transfer function.

Table 6.
Ocular aberrometry analysis measured by Zywave II® at post-op 3 months
Values Values
HOA 5 mm (μm) 0.30 ± 0.09 HOA 6 mm (μm) 0.49 ± 0.15
Trefoil (μm) 0.19 ± 0.10 Coma (μm) 0.11 ± 0.08
Quadrafoil (μm) 0.11 ± 0.07 2nd astigmatism (μm) 0.05 ± 0.03
Spherical aberration (μm) 0.22 ± 0.07 Pentafoil (μm) 0.05 ± 0.03
2nd trefoil (μm) 0.02 ± 0.01 2nd coma (μm) 0.02 ± 0.01

Values are presented as mean ± SD. HOA = high-order aberration.

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