Simulation of the Through-Focus Modulation Transfer Functions According to the Change of Spherical Aberration in Pseudophakic Eyes

다국어 초록 (Multilingual Abstract)

To evaluate the effects of spherical aberration (SA) correction on optical quality in pseudophakic eyes,we simulated the optical quality of the human eye by computation of the modulation transfer function(MTF). We reviewed the medical records of patients who underwent cataract surgery in Asan MedicalCenter, retrospectively. A Zywave aberrometer was used to measure optical aberrations at 1–12postoperative months in patients with AR40e intraocular lens implants. The MTF was calculated for a5 mm pupil from measured wavefront aberrations. The area under the MTF curve (aMTF) was analyzedand the maximal aMTF was calculated while changing the SA (-0.2 ~ +0.2 μm) and the defocus (-2.0~ +2.0 D). Sixty-four eyes in 51 patients were examined. The maximal aMTF was 6.61 ± 2.16 at a defocusof –0.25 ± 0.66 D with innate SA, and 7.64 ± 2.63 at a defocus of 0.08 ± 0.53 D when the SA was0 (full correction of SA). With full SA correction, the aMTF increased in 47 eyes (73.4%; Group 1) anddecreased in 17 eyes (26.6%; Group 2). There were statistically significant differences in Z(3, –1) (verticalcoma; P = 0.01) and Z(4, 4) (tetrafoil; P = 0.04) between the groups. The maximal aMTF was obtainedat an SA of +0.01 μm in Group 1 and an SA of +0.13 μm in Group 2. Optical quality can be improvedby full correction of SA in most pseudophakic eyes. However, residual SA might provide benefits in eyeswith significant radially asymmetric aberrations

참고문헌 (Reference)

1 G. H. Beiko, "“Distribution of corneal spherical aberration in a comprehensive ophthalmology practice and whether keratometry can predict aberration values" 33 : 848-858, 2007

2 M. A. Nanavaty, "Wavefront aberrations, depth of focus, and contrast sensitivity with aspheric and spherical intraocular lenses:fellow-eye study" 35 : 663-671, 2009

3 G. Y. Yoon, "Visual performance after correcting the monochromatic and chromatic aberrations of the eye" 19 : 266-275, 2002

4 J. DeCoster, "Testing group differences using t-tests, ANOVA, and nonparametric measures"

5 K. Negishi, "Predictability of ocular spherical aberration after cataract surgery determined using preoperative corneal spherical aberration" 36 : 756-761, 2010

6 G. H. Beiko, "Personalized correction of spherical aberration in cataract surgery" 33 : 1455-1460, 2007

7 J. D. Solomon, "Outcomes of corneal spherical aberration-guided cataract surgery measured by the OPD-scan" 26 : 863-869, 2010

8 R. Bellucci, "Optimizing higher-order aberrations with intraocular lens technology" 18 : 67-73, 2007

9 R. Navarro, "Optics of the average normal cornea from general and canonical representations of its surface topography" 23 : 219-232, 2006

10 S. Marcos, "Optical quality and depth-of-field of eyes implanted with spherical and aspheric intraocular lenses" 21 : 223-235, 2005

11 J. Liang, "Objective measurement of wave aberrations of the human eye with the use of a Hartmann-Shack wave-front sensor" 11 : 1949-1957, 1994

12 Y. Nochez, "Measurement of corneal aberrations for customisation of intraocular lens asphericity: impact on quality of vision after micro-incision cataract surgery" 94 : 440-444, 2009

13 H. H. Dietze, "Limitations of correcting spherical aberration with aspheric intraocular lenses" 21 : S541-S546, 2005

14 R. A. Applegate, "Interaction between aberrations to improve or reduce visual performance" 29 : 1487-1495, 2003

15 F. Taketani, "Influence of intraocular lens tilt and decentration on wavefront aberrations" 30 : 2158-2162, 2004

16 M. K. Smolek, "Goodness-of-prediction of Zernike polynomial fitting to corneal surfaces" 31 : 2350-2355, 2005

17 T. Yamaguchi, "Feasibility of spherical aberration correction with aspheric intraocular lenses in cataract surgery based on individual pupil diameter" 35 : 1725-1733, 2009

18 H. Kobashi, "Effect of pupil size on optical quality parameters in astigmatic eyes using a double-pass instrument" 2013 : 124327-, 2013

19 L. Wang, "Effect of decentration of wavefront-corrected intraocular lenses on the higher-order aberrations of the eye" 123 : 1226-1230, 2005

20 T. Eppig, "Effect of decentration and tilt on the image quality of aspheric intraocular lens designs in a model eye" 35 : 1091-1100, 2009

21 D. D. Koch, "Custom optimization of intraocular lens asphericity" 105 : 36-41, 2007

22 A. Guirao, "Corneal aberrations before and after small-incision cataract surgery" 45 : 4312-4319, 2004

23 K. W. van Gaalen, "Clinical comparison of the optical performance of aspheric and spherical intraocular lenses" 36 : 34-43, 2010

24 L. N. Thibos, "Clinical applications of the Shack-Hartmann aberrometer" 76 : 817-825, 1999

25 K. Y. Li, "Changes in aberrations and retinal image quality due to tear film dynamics" 14 : 12552-12559, 2006

26 S. Marcos, "Change in corneal aberrations after cataract surgery with 2types of aspherical intraocular lenses" 33 : 217-226, 2007

27 M. Packer, "Aspheric intraocular lens selection based on corneal wavefront" 25 : 12-20, 2009

28 R. Montes-Mico, "Analysis of the possible benefits of aspheric intraocular lenses:review of the literature" 35 : 172-181, 2009

29 P. M. Prieto, "Analysis of the performance of the Hartmann-Shack sensor in the human eye" 17 : 1388-1398, 2000

30 P. A. Piers, "Adaptive optics simulation of intraocular lenses with modified spherical aberration" 45 : 4601-4610, 2004

31 J. T. Holladay, "A new intraocular lens design to reduce spherical aberration of pseudophakic eyes" 18 : 683-691, 2002