Ultrasound biomicroscopic study of anterior segment changes after phacoemulsification and foldable intraocular lens implantation.

Abstract:

PURPOSE:To report quantitative changes in the anterior segment configuration after clear corneal incision phacoemulsification and foldable intraocular lens (IOL) implantation by means of ultrasound biomicroscopy (UBM). DESIGN:Prospective, nonrandomized, comparative (self-controlled) trial. PARTICIPANTS:Twenty-one eyes of 19 patients with senile or presenile cataracts and no other ocular illness. METHODS:Patients were examined with UBM before and 1 and 3 months after surgery. At each UBM examination, axial images of the anterior chamber and radial sections of the angle at the superior, lateral, inferior, and medial quadrants were obtained. MAIN OUTCOME MEASURES:Central anterior chamber depth (ACD), iris-lens contact distance, iris-lens angle (ILA), angle opening distance at points 250 (AOD250) and 500 microm (AOD500) from the scleral spur, trabecular-iris angle (TIA), iris thickness 500 microm from the scleral spur (IT), trabecular-ciliary process distance (TCPD), iris-ciliary process distance (ICPD), iris-zonule distance, iris-sclera angle (ISA), and ciliary process-sclera angle (CPSA). After surgery, central anterior chamber depth was also measured from the cornea to the IOL (ACD) and from the cornea to the pupillary plane (ACD2). Each variable was measured twice in different days by the same observer. RESULTS:The variables IT, TCPD, ICPD, IZD, and CPSA did not significantly change after surgery (P > 0.01). Central anterior chamber depth increased approximately 30% after surgery (approximately 850 microm; P < 0.001), by both measurement methods used (ACD x ACD and ACD x ACD2). Anterior chamber angle significantly increased, by approximately 50% of the initial value, by the three measurement methods used: AOD250 (P

journal_name

Ophthalmology

journal_title

Ophthalmology

authors

Pereira FA,Cronemberger S

doi

10.1016/S0161-6420(03)00623-7

subject

Has Abstract

pub_date

2003-09-01 00:00:00

pages

1799-806

issue

9

eissn

0161-6420

issn

1549-4713

pii

S0161-6420(03)00623-7

journal_volume

110

pub_type

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