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

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

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.

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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).
jkos-50-1308f1.tif
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)
jkos-50-1308f2.tif
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)
jkos-50-1308f3.tif
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.
jkos-50-1308f4.tif
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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