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Lee, Kim, Lee, and Lee: Comparison of Efficacy and Safety between Superior 180 Degree and Inferior 180 Degree Selective Laser Trabeculoplasty
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(11): 1642-1648.

Published online: 19 November 2012

DOI: https://doi.org/10.3341/jkos.2012.53.11.1642

Comparison of Efficacy and Safety between Superior 180 Degree and Inferior 180 Degree Selective Laser Trabeculoplasty

Jong Wook Lee, MD, Eun Joo Kim, MD, Tae Yoon Lee, MD, Kyoo Won Lee, MD

Cheil Eye Hospital, Daegu, Korea.

Address reprint requests to Kyoo Won Lee, MD. Cheil Eye Hospital, #1 Ayang-ro, Dong-gu, Daegu 701-820, Korea. Tel: 82-53-959-1751, Fax: 82-53-959-1758, eye7575@korea.com

Received 21 July 2012       Accepted 16 October 2012

Copyright © 2012 The Korean Ophthalmological Society

Abstract

Purpose

To compare the intraocular pressure (IOP)-lowering effect and safety between superior 180 degree and inferior 180 degree selective laser trabeculoplasty (SLT).

Methods

Forty patients with primary open-angle glaucoma and normal tension glaucoma were treated with superior 180-degree SLT, and 28 patients with the same diagnosis were treated with inferior 180-degree SLT. IOP was checked at 1 day, and 1, 2, 3, and 6 months after SLT. Anterior chamber reaction and ocular pain was evaluated at postoperative 1 day. Peripheral anterior synechia was examined at 6 months postoperatively.

Results

At the postoperative 6-month follow-up, the superior treatment group had a mean IOP of 15.53 ± 3.49 mm Hg with a mean reduction of 24.6%, while the inferior treatment group had a mean IOP of 17.18 ± 3.29 mm Hg with a mean reduction of 21.9%. There were no significant differences in IOP reduction between the 2 groups. There was a slightly higher anterior chamber reaction rate in the inferior treatment group.

Conclusions

The site of SLT application is not important for IOP reduction. Both superior 180 degree and inferior 180 degree SLT are safe and effective procedures for glaucoma treatment because of successful IOP reduction and low complication risks.

Keywords: Intraocular pressure, Selective laser trabeculoplasty, Superior 180 degree and inferior 180 degrees

Figures and Tables

Table 1
Demographic characteristics of patients
jkos-53-1642-i001

Values are presented as mean ± SD or n.

POAG = primary open-angle glaucoma; NTG = normal tension glaucoma; TM = trabecular meshwork.

*Mann-Whitney U test; †Pearson chi-square test; ‡Wilcoxon signed rank test.

Table 2
Changes in intraocular pressure during 6 months of follow-up in superior and inferior SLT group
jkos-53-1642-i002

Values are presented as mean ± SD.

*Mann-Whitney U test.

Table 3
Changes in intraocular pressure during 6 months of follow-up in POAG and NTG
jkos-53-1642-i003

Values are presented as mean ± SD.

POAG = primary open-angle glaucoma; NTG = normal tension glaucoma.

*Mann-Whitney U test.

Table 4
Mean IOP reduction during 6 months of follow-up in superior and inferior SLT group
jkos-53-1642-i004

Values are presented as mean ± SD (%).

*Mann-Whitney U test.

Table 5
Mean IOP reduction during 6 months of follow-up in POAG and NTG
jkos-53-1642-i005

Values are presented as mean ± SD.

POAG = primary open-angle glaucoma; NTG = normal tension glaucoma.

*Mann-Whitney U test.

Table 6
Success rate of selective laser trabeculoplasty
jkos-53-1642-i006

Values are presented as % (No. of eyes).

IOP = intraocular pressure.

*Fisher exact test.

Table 7
Number of glaucoma medications: pre- and post-SLT
jkos-53-1642-i007

Values are presented as mean ± SD.

*Wilcoxon signed rank test.

Table 8
Complications after SLT in superior and inferior SLT group
jkos-53-1642-i008

Values are presented as % (No. of eyes) unless otherwise indicated.

IOP = intraocular pressure; PAS = peripheral anterior synechia.

*Observed at postoperative 6 months.

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