Clinical Result After Implantation of Minus Diopter Intraocular Lens in the High Myopia Patients

Jin Woo Kwon; Hyun Soo Lee; Sin Hye Park; Choun Ki Joo

doi:10.3341/jkos.2009.50.9.1308

Journal List > J Korean Ophthalmol Soc > v.50(9) > 1008354

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Kwon, Lee, Park, and Joo: Clinical Result After Implantation of Minus Diopter Intraocular Lens in the High Myopia Patients

Original Article

J Korean Ophthalmol Soc 2009;50(9):1308-1312.

Published online: 7 September 2009

DOI: https://doi.org/10.3341/jkos.2009.50.9.1308

Clinical Result After Implantation of Minus Diopter Intraocular Lens in the High Myopia Patients

Jin Woo Kwon, MD, Hyun Soo Lee, MD, Sin Hye Park, MD, Choun Ki Joo, MD

Department of Ophthalmology and Visual Science, The Catholic University of Korea, Seoul, Korea

Address reprint requests to Choun Ki Joo, MD Department of Ophthalmology and Visual Science, Seoul St. Mary's Hospital #505 Banpo-dong, Seocho-gu, Seoul 137-701, Korea Tel: 82-2-2258-1188, Fax: 82-2-599-7405, E-mail: ckjoo@catholic.ac.kr

Received 20 October 2008 Accepted 23 June 2009

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

To investigate the clinical results of 44 high myopic eyes with cataracts which had minus diopter IOLs (Intraocular lenses) implanted during cataract surgery.

Methods

A retrospective chart review was done on 44 eyes in 33 patients who had undergone cataract extraction and minus diopter posterior chamber lens implantation. The IOL power was calculated using the SRK-T formula, and ACR6D SE^® (Corneal SA, France) IOL was implanted in all cases. We evaluated pre-operative target refraction, postoperative refraction at six months, pre-operative visual acuity with and without correction, and postoperative visual acuity with and without correction. The relationships between axial length and refractive error and between the diopter of IOLs and refractive error were analyzed.

Results

The mean postoperative hyperopic refractive error compared to the preoperative target refraction was +1.04 ±1.05D, which was statistically significant (p<0.01). The longer the axial length and the larger the minus diopter lens inserted, the larger the hyperopic error. However, there were no statistically significant differences between them.

Conclusions

Satisfactory results in visual acuity were obtained after cataract surgery in high myopic patients. However, when choosing the IOL power in high myopic patients, the possible development of postoperative hyperopic error should be considered.

Keywords: Axial length, Cataract surgery, High myopia, Minus lens, SRK-T formula

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Figure 1.

The graph of distribution of patients according to refractive error shows relative hyperopic results than our expectations (Refractive error=postoperative refraction at 6 months-preoperative target diopter).

Figure 2.

Scatter gram of axial length and refractive error shows the longer the axial length was, the larger hyperopic errors grew. But there were no statistically significant differences between them (Refractive error : postoperative refraction at 6 months-preoperative target diopter). (r²=0.025 p=0.302 refractive error= 0.086× axial length-1.842)

Figure 3.

Scatter gram of IOL diopter power and refractive error shows the larger the minus diopter lens was inserted, the larger hyperopic errors grew. But there were no statistically significant differences between them (Refractive error=postoperative refraction at 6 months-preoperative target diopter). (r²=0.062 p=0.102 refractive error=-0.10× IOL diopter+0.664)

Figure 4.

The change of potoperative refraction shows mild hyperopic shift. But there were no statistically significant differences between them (p=0.054).^∗ SE=spherical equivalent.

Table 1.

Demographics of patients and implanted IOL

Variables	Patients
N (eyes)	33 (44)
Age (years)	59.4±9.7
Sex (Male / Female)	11 / 22
Axial length (mm)	33.20±2.46
IOL power (diopter)	-3.77±2.65

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