Journal List > J Korean Ophthalmol Soc > v.54(4) > 1009645

Kim, Cheon, Ko, Kim, Kim, and Tchah: Clinical Outcome of in-the-Bag Single-Piece Aspheric Intraocular Lens Implantation after Microincision Cataract Surgery

Abstract

Purpose

To evaluate the stability and optical performance of the newly developed single-piece aspheric intraocular lens (IOL) by comparing the clinical outcome of the aspheric IOL with the new optic profile design (HOYA iSert, HOYA iMics) and the aspheric IOL (Akreos MI60), which has been proven effective and safe.

Methods

iSert, iMics, and MI60 were inserted into 55 eyes, 60 eyes, and 50 eyes, respectively, after microincision phacoemulsification cataract surgery. Best corrected visual acuity (BCVA), refraction in spherical equivalent, anterior chamber depth (ACD), total higher order aberration (HOA), contrast sensitivity, and surgically induced astigmatism (SIA) were measured and each IOL was evaluated on the functional stability, anterior-posterior stability, centration in the capsular bag, and quality of vision.

Results

No statistical differences in preoperative and postoperative BCVA among the 3 IOL groups were observed, however, MI60 showed significant myopic shift postoperatively. Anterior-posterior stability assessed with postoperative change in refractive error and ACD was slightly lower in the MI60 group. In terms of vision quality, while total aberration, total HOA, coma aberration, and contrast sensitivity for the 3 IOLs were not different significantly, spherical aberration of the MI60 group was higher than the other groups at 6 months postoperative. SIA was significantly increased in eyes implanted with iSert than in eyes with iMics or MI60 at 1 month postoperatively, however, the differences were no longer evident after 3 months postoperatively.

Conclusions

The new aspheric IOLs, iSert and iMics, showed good stability and visual outcome equal to MI60 at the 6-month postoperative follow-up.

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Figure 1.
Comparison of postoperative contrast sensitivity in photophic and mesopic conditions (M ean). The asterisks (*) indicate the differences in values were significant (p < 0.05) among three groups. (A) Contrast sensitivity in photopic condition at postoperative 1 month. (B) Contrast sensitivity in mesopic condition at postoperative 1 month. (C) Contrast sensitivity in photopic condition at postoperative 3 months. (D) Contrast sensitivity in mesopic condition at postoperative 3 months.
jkos-54-595f1.tif
Table 1.
Comparison of preoperative characteristics among three groups
HOYA iSert PC-60AD (n = 55) HOYA iMics NY-60 (n = 60) Akreos MI60 (n = 50) p-value
Age (years) 70.2 ± 8.6 68.6 ± 12.3 66.7 ± 10.5 0.231
Sex (Male/Female) 30/25 29/31 28/22 0.155*
BCVA (log MAR) 0.50 ± 0.24 0.45 ± 0.30 0.46 ± 0.44 0.126
Manifest refraction (Diopter) -0.88 ± 2.95 -1.01 ± 2.84 -0.83 ± 2.72 0.305
Axial Length (mm) 23.2 ± 0.8 23.4 ± 0.9 23.6 ± 1.3 0.255
IOL power (Diopters) 20.5 ± 2.6 21.1 ± 2.3 20.9 ± 2.2 0.520
Target refraction (Diopter) -0.20 ± 0.51 -0.25 ± 0.79 -0.22 ± 0.63 0.385
ACD (mm) 2.60 ± 0.51 2.72 ± 0.36 2.76 ± 0.43 0.177
Pupil diameter (mm) under mesopic condition 4.64 ± 0.66 4.52 ± 0.60 4.62 ± 0.55 0.441

Values are presented as mean ± SD.

BCVA = best corrected visual acuity; log MAR = logarithm of the minimum angle of resolution; IOL = intraocular lens; ACD = anterior chamber depth.

* ANOVA with Bonferroni post-hoc tests (except value = chi-square test).

Table 2.
Comparison of postoperative total aberration, total high order aberration, spherical aberration, and coma aberration for three different IOLs by 6 months postoperative
IOL Postop 1M p-value Postop 3M p-value Postop 6M p-value
RMS total (μm) iSert 1.09 ± 0.46 0.240 1.08 ± 0.32 0.301 1.06 ± 0.34 0.119
iMics 1.01 ± 0.61 0.99 ± 0.74 0.92 ± 0.61
MI60 1.17 ± 0.58 1.06 ± 0.42 1.02 ± 0.47
RMS HOA (μm) iSert 0.46 ± 0.31 0.144 0.42 ± 0.07 0.430 0.47 ± 0.18 0.305
iMics 0.35 ± 0.18 0.43 ± 0.10 0.40 ± 0.20
MI60 0.49 ± 0.17 0.50 ± 0.18 0.50 ± 0.22
SA (μm) iSert -0.01± 0.03 0.062 0.00 ± 0.12 0.055 0.07 ± 0.16 0.040
iMics 0.06 ± 0.16 0.02 ± 0.11 0.05 ± 0.23
MI60 0.16 ± 0.11 0.20 ± 0.07 0.22 ± 0.19
Coma aberration (μm) iSert 0.28 ± 0.09 0.101 0.30 ± 0.08 0.089 0.27 ± 0.10 0.560
iMics 0.26 ± 0.22 0.22 ± 0.16 0.24 ± 0.13
MI60 0.19 ± 0.12 0.24 ± 0.09 0.22 ± 0.13

Values are presented as mean ± SD.

IOL = intraocular lens; RMS total= root mean square of total aberrations; RMS HOA = root mean square of total higher order aberrations; SA = spherical aberration.

Table 3.
Comparison of postoperative surgically induced astigmatism among three IOL groups
IOL Postop 1M p-value Postop 3M p-value Postop 6M p-value
SIA iSert 0.84± 0.66 0.020 0.60 ± 0.31 0.159 0.64 ± 0.42 0.195
iMics 0.58 ± 0.68 0.49 ± 0.66 0.50 ± 0.60
MI60 0.57 ± 0.45 0.55 ± 0.51 0.49 ± 0.57

Values are presented as mean ± SD.

IOL = intraocular lens; SIA = surgically induced astigmatism.

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