J Korean Ophthalmol Soc.  2014 Jun;55(6):809-816.

Clinical Outcomes of Cataract Surgery with Correction of Corneal Spherical Aberration

• Lee J
• Choi HJ
• Kim MK
• Wee WR

Abstract

PURPOSE
To evaluate preoperative and postoperative spherical aberrations after cataract surgery based on selecting spherical or aspheric intraocular lens (IOL) according to preoperative corneal aberration.
METHODS
The medical records of patients who underwent phacoemulsification and IOL implantation in the posterior chamber by a surgeon (H.J.C) were reviewed (68 patients, 97 eyes). IOL was selected based on preoperative corneal spherical aberration measured by corneal topography (ATLAS 9000, Carl Zeiss). The target postoperative total ocular spherical aberration was set to zero (0) and one of the following lenses was chosen: Acrysof SA60AT (n = 25), Acrysof IQ (n = 36) or Tecnis(R) ZCB00 (n = 36). The Wavescan aberrometer and the corneal topography were obtained postoperatively. Absolute prediction errors of postoperative total ocular spherical aberration were analyzed.
RESULTS
Preoperative corneal spherical aberration was 0.241 microm; total postoperative ocular spherical aberration was 0.0509 microm (Acrysof SA60AT: 0.0954 microm, Tecnis(R) ZCB00: 0.0374 microm, Acrysof IQ: 0.0335 microm). Postoperative corneal spherical aberration was 0.232 microm, which was not significantly different from the preoperative value (p = 0.199). Postoperative ocular spherical aberration was 0.051 microm; 0.095 microm (Acrysof SA60AT), 0.034 microm (Acrysof IQ), and 0.037 microm (ZCB00). The reducing amounts of spherical aberration were 0.185 microm (Acrysof IQ) and 0.311 microm (ZCB00). The overall absolute prediction error was 0.068 microm. The absolute prediction error of the Acrysof SA60AT group was 0.092 microm, Tecnis(R) ZCB00 group was 0.067 microm and Acrysof IQ group was 0.054 microm. There was no significant difference among the 3 groups (p = 0.089).
CONCLUSIONS
Aspheric IOLs can efficiently reduce total ocular spherical aberrations according to preoperative corneal spherical aberrations.

Keyword

Aspheric intraocular lens; Cataract surgery; Spherical aberration

MeSH Terms

Cataract*
Corneal Topography
Humans
Lenses, Intraocular
Medical Records
Phacoemulsification

Figure

• 

  Figure 1. Corneal and ocular wavefront image of same patient. (A) Preoperative corneal wavefront image measured with ATLAS 9000 corneal topography. As shown, the spherical aberration is 0.201 μm. Thus, this patient underwent cataract surgery with Acrysof IQ SN60WF lens. (B) Postoperative corneal spherical aberration has increased to 0.245 μm, 3 months after surgery. (C) Despite increase of corneal spherical aberration, the postoperative ocular spherical aberration was almost zero (0.01582 μm) be-cause of negative spherical aberration of intraocular lens.

• 

  Figure 2. Frequency distribution of corneal topographic wavefront spherical aberration (Z4,0) in the study population. (A) Distribution of preoperative data. (B) Distribution of postoperative data.

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  Figure 3. Predicted versus measured postoperative wavefront spherical aberration for the entire study population. Note the central gray area that the absolute errors are less than 0.1 μm.

Reference

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