Axial Length Change after Implantable Collamer Lens Implantation

Ju Yong Seok; Damho Lee; Haksu Kyung; Joon Mo Kim

doi:10.3341/jkos.2013.54.11.1675

Journal List > J Korean Ophthalmol Soc > v.54(11) > 1009529

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Seok, Lee, Kyung, and Kim: Axial Length Change after Implantable Collamer Lens Implantation

Original Article

J Korean Ophthalmol Soc 2013;54(11):1675-1679.

Published online: 2 September 2013

DOI: https://doi.org/10.3341/jkos.2013.54.11.1675

Axial Length Change after Implantable Collamer Lens Implantation

Ju Yong Seok, MD¹, Damho Lee, MD, PhD², Haksu Kyung, MD, PhD¹, Joon Mo Kim, MD, PhD³

¹Department of Ophthalmology, National Medical Center, Seoul, Korea

²Vision Eye Center, Seoul, Korea

³Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea

Address reprint requests to Damho Lee, MD, PhD, Vision Eye Center, #581-15 Sinsa-dong, Gangnam-gu, Seoul 135-120, Korea, Tel: 82-2-548-3579, Fax: 82-2-540-1431, E-mail: damholee@naver.com

Received 2 February 2013 Revised 21 May 2013 Accepted 23 September 2013

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

The axial length measurement is an important variable in calculating the intraocular lens (IOL) power in cataract surgery. In this study, the effects of the implantable collamer lens (ICL) on the axial length measurement were investigated.

Methods

The axial lengths of 141 eyes of 76 highly myopic patients were measured before ICL implantation and 1 month postoperatively using applanation A-scan ultrasound.

Results

The measured axial lengths before ICL implantation and 1 month after the surgery were 28.03 ± 1.91 mm and 28.08 ± 1.86 mm respectively, with a statistically significant difference of 0.05 mm (p = 0.036). These 2 values showed a high correlation (R² = 0.9829, p < 0.0001).

Conclusions

Even though the axial length after ICL implantation significantly increased, the 0.05 mm change was too small to influence the determination of the IOL diopters in cataract surgery. Therefore, ICL implantation history may be reflected when measuring the axial length for the IOL power calculation in cataract surgery, but the axial length measured immediately before the cataract surgery may be used to calculate the IOL power regardless of the ICL implantation history.

Keywords: A-scan ultrasonography, Axial length measurement, Implantable collamer lens

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Figure 1.

Relation between preoperative axial length (x-axis) and postoperative axial length (y-axis) (y = 0.9665x + 0.9844, R² = 0.9829, p < 0.0001).

Table 1.

Demographics of patients and preoperative and postoperative characteristics

		Demographics
Age (years)		29.9 ± 7.6 (range; 19-49)
Sex (Female/Male) (eyes)		54 (101) / 22 (40)

	Pre-op.	Post-op.	p-value^*
Axial Length (mm)	28.03 ± 1.91	28.08 ± 1.86	0.036
Spherical Equivalent (D)	−12.61 ± 4.34	−0.93 ± 0.95	<0.0001
BCVA (log MAR)	0.06 ± 0.21	−0.03 ± 0.18	<0.0001

Values are presented as mean ± SD.

Pre-op. = Preoperative; Post-op. = Postoperative; D = diopter; BCVA = best corrected visual acuity; log MAR = log minimal angle of resolution.

^* From the paired t-test.

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