Comparison of Nd:YAG Capsulotomy Rates between Spherical and Aspheric Intraocular Lenses

Ikhyun Jun; Kyoung Yul Seo; Eung Kweon Kim; Tae Im Kim

doi:10.3341/JKOS.2011.52.4.414

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Jun, Seo, Kim, and Kim: Comparison of Nd:YAG Capsulotomy Rates between Spherical and Aspheric Intraocular Lenses

Original Article

J Korean Ophthalmol Soc 2011;52(4):414-419.

Published online: 6 September 2011

DOI: https://doi.org/10.3341/JKOS.2011.52.4.414

Comparison of Nd:YAG Capsulotomy Rates between Spherical and Aspheric Intraocular Lenses

Ikhyun Jun, M.D., Kyoung Yul Seo, MD, PhD, Eung Kweon Kim, MD, PhD, Tae Im Kim, MD, PhD

The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea

Address reprint requests to Tae Im Kim, MD, PhD Department of Ophthalmology, Yonsei University Severance Hospital #250 Seongsan-ro, Seodaemun-gu, Seoul 120-752, Korea Tel: 82-2-2228-3570, Fax: 82-2-312-0541, E-mail: taeimkim@gmail.com

Received 10 May 201015 January 2011 Accepted 27 January 2011

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 purpose of the present study is to compare Nd:YAG capsulotomy rates between spherical and aspheric intraocular lenses.

Methods

The present retrospective study enrolled patients who received cataract surgery by a single surgeon between March 1, 2006 and October 31, 2009. Patients included in the study were implanted with SA60AT spherical intraocular lenses (Alcon, Fort Worth, TX, USA, 66 eyes), SN60AT spherical intraocular lenses (Alcon, 48 eyes; a total of 114 eyes), or SN60WF aspheric intraocular lenses (Alcon, 187 eyes). The Nd:YAG capsulotomy rates were compared between the two groups 6 months after the operation. Ten patients who were implanted with a spherical intraocular lens in one eye and an aspheric intraocular lens in the contralateral eye were analyzed separately.

Results

Nd:YAG capsulotomy was performed in 2 of 114 eyes (1.8%) in the spherical intraocular lens group and 7 of 187 eyes (3.2%) in the aspheric intraocular lens group; no significant difference was found (p = 0.359). Among the 10 patients who were implanted with 2 different intraocular lenses, Nd:YAG capsulotomy was performed in only 1 eye in the aspheric intraocular lens group; no significant difference was found (p = 0.500).

Conclusions

The design of the intraocular lens, especially the shape of the posterior optic, does not influence the rate of Nd:YAG capsulotomy.

Keywords: Aspheric, Nd:YAG capsulotomy, Optic design, Posterior capsule opacification, Spherical

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Figure 1.

Horizontal shape of SN60WF lens: a 9% reduction of central thickness than SN60AT lens. Red dotted line: an imaginary line of spherical SN60AT margin (provided from Alcon, Fort Worth, TX, USA).

Table 1.

Preoperative patient characteristics

	Spherical group (SA60AT, SN60AT)	Aspheric group (SN60WF)	p-value
Age (yr)
Mean ± SD	66.00 ± 11.72	68.11 ± 11.60	0.128
Range	29 to 94	18 to 89
Sex, n (%)
Male	41 (36.0)	70 (37.4)
Female	73 (64.0)	117 (62.6)	0.798
Eye (n)	114	187
Right	56	92
Left	58	95	0.990

Table 2.

The incidence of Nd:YAG capsulotomy

	Spherical group (SA60AT, SN60AT)	Aspheric group (SN60WF)	p-value
Capsulotomy rate (n/total, (%))	2/114 (1.8)	6/187 (3.2)	0.359

Table 3.

The incidence of Nd:YAG capsulotomy (fellow eye study)

	Spherical group (SA60AT, SN60AT)	) Aspheric group (SN60WF)	p-value
Capsulotomy rate (n/total, (%))	0/10 (0.0)	1/10 (10.0)	0.500

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