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Kim and Park: The Effect of Two Different Opening Patterns of Neodymium:YAG Laser Posterior Capsulotomy on Visual Function
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(3): 390-395.

Published online: 15 March 2012

DOI: https://doi.org/10.3341/jkos.2012.53.3.390

The Effect of Two Different Opening Patterns of Neodymium:YAG Laser Posterior Capsulotomy on Visual Function

Youngkook Kim, MD, Jongseok Park, MD, PhD

Department of Ophthalmology, Eulji General Hospital, Eulji University School of Medicine, Seoul, Korea.

Address reprint requests to Jongseok Park, MD, PhD. Department of Ophthalmology, Eulji General Hospital, #14 Hangeulbiseok-gil, Nowon-gu, Seoul 139-872, Korea. Tel: 82-2-970-8269, Fax: 82-2-970-8273, pjs4106@eulji.ac.kr

Received 5 October 2010       Accepted 27 September 2011

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To investigate the effects of two different opening patterns in neodymium:yttrium-aluminum-garnet (Nd:YAG) laser posterior capsulotomy on visual function.

Methods

A randomized prospective study was conducted on 62 pseudophakic eyes from 50 patients with posterior capsular opacification (PCO). Groups A and B underwent laser posterior capsulotomy with a cruciate opening and a modified circular opening, respectively. The best corrected visual acuity (BCVA), contrast sensitivity, and glare sensitivity were measured before and after laser posterior capsulotomy in both groups. The occurrences of intraocular lens (IOL) pittings were investigated and compared between the two groups.

Results

After laser capsulotomy, there were significant increases in BCVA, contrast and glare sensitivity in both groups and no significant differences between the two groups. However, group A had significantly more patients with three or more IOL pittings within a 1.5-mm radius from the IOL center (p = 0.047). In group A, these patients had significantly less contrast sensitivity (p = 0.023 in 1.6 cpd) and glare sensitivity (p = 0.043 in 1.6 cpd) than did patients with two or fewer IOL pittings.

Conclusions

Nd:YAG laser posterior capsulotomy using a modified circular opening can be considered an effective method to manage PCO.

Keywords: Contrast sensitivity, Glare sensitivity, Neodymium:YAG laser posterior capsulotomy, Opening patterns

Figures and Tables

Figure 1
Two different opening patterns of Nd:YAG laser posterior capsulotomy.
jkos-53-390-g001
Figure 2
One month after Neodymium:YAG laser posterior capsulotomy performed with the modified circular opening procedure. This demonstrates that the inferior portion of circular opening at 6 o'clock remains attached to the posterior capsule.
jkos-53-390-g002
Table 1
Patient characteristics
jkos-53-390-i001

Values are presented as number or mean ± SD.

DM = diabetes mellitus.

†Statistical significances between group A and B were tested by Mann-Whitney U-test.

Table 2
Changes in mean (± SD) IOP, floater, anterior chamber reactions and IOL pittings after Nd:Yag laser capsulotomy at postlaser 1 month
jkos-53-390-i002

SD = standard deviation; IOP = intraocular pressure; IOL = intraocular lens.

*Statistical significances between group A and B were tested by Paired t-test; †Statistical significances between group A and B were tested by Mann-Whitney U-test.

Table 3
Changes in mean (± SD) BCVA, contrast sensitivity and glare sensitivity after Nd:Yag laser capsulotomy at postlaser 1 month
jkos-53-390-i003

SD = standard deviation; BCVA = best corrected visual acuity; CPD = cycle per degree.

*Statistical significances between group A and B were tested by Paired t-test; †Statistical significances between group A and B were tested by Mann-Whitney U-test.

Table 4
Changes in group A mean (± SD) BCVA, contrast sensitivity and glare sensitivity after Nd:Yag laser capsulotomy at postlaser 1 month in group A
jkos-53-390-i004

SD = standard deviation; BCVA = best corrected visual acuity; CPD = cycle per degree; IOL = intraocular lens.

*Three or more IOL pittings within 1.5-mm radius from IOL center; †Two or less IOL pittings within 1.5-mm radius from IOL center.

‡Statistical significances between group A and B were tested by Paired t-test; §Statistical significances between group A and B were tested by Mann-Whitney U-test.

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