The effect of laser iridotomy on the anterior segment anatomy of patients with plateau iris configuration.

Abstract:

PURPOSE:To determine if laser iridotomy altered the anterior segment anatomy of patients with plateau iris configuration. METHODS:Twenty eyes of 9 female and 1 male patients were imaged using an ultrasound biomicroscope within 19 weeks before and 52 weeks after laser iridotomy. Measurements obtained included the anterior chamber depth (ACD), trabecular-ciliary process distance (TCPD), iris thickness (IT), angle opening distance at 500 micrometers (AOD), iridozonular distance (IZD), and trabecular-iris angle (TIA). Comparisons of the pre- and post- iridotomy measurements were made using a two-tailed paired t test. RESULTS:Laser iridotomy elicited no statistically significant change in ACD, TCPD, IT, AOD, or TIA. However, IZD was decreased (P < 0.05) in both eyes after laser iridotomy. Configuration of the irides was flat before and after laser iridotomies. CONCLUSION:This study suggests that laser iridotomy did not alter anterior segment anatomy, probably because of the fixed anterior insertion of the iris and ciliary body in plateau iris configuration. The decrease in IZD distance may be the result of a small posterior movement of the iris due to a reduction in relative pupillary block, secondary to laser iridotomy. The small reduction in relative papillary block in plateau iris configuration does not alter the width of the anterior chamber angle as measured by AOD and TIA.

journal_name

J Glaucoma

journal_title

Journal of glaucoma

authors

Polikoff LA,Chanis RA,Toor A,Ramos-Esteban JC,Fahim MM,Gagliuso DJ,Serle JB

doi

10.1097/01.ijg.0000151687.96785.03

keywords:

subject

Has Abstract

pub_date

2005-04-01 00:00:00

pages

109-13

issue

2

eissn

1057-0829

issn

1536-481X

pii

00061198-200504000-00004

journal_volume

14

pub_type

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