J Korean Ophthalmol Soc.  2009 Sep;50(9):1308-1312. 10.3341/jkos.2009.50.9.1308.

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

• Kwon JW
• Lee HS
• Park SH
• Joo CK

• KMID: 2212612
• DOI: http://doi.org/10.3341/jkos.2009.50.9.1308

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(R) (Corneal SA, France) IOL was implanted in all cases. We evaluated pre-operative target refraction, post-operative refraction at six months, pre-operative visual acuity with and without correction, and post-operative 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.

Keyword

Axial length; Cataract surgery; High myopia; Minus lens; SRK-T formula

MeSH Terms

Cataract
Cataract Extraction
Eye
Humans
Lenses, Intraocular
Myopia
Refractive Errors
Retrospective Studies
Visual Acuity

Figure

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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).

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  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)

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  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)

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  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.

Reference

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