The Effect of Laser Peripheral Iridotomy on Corneal Transparency in Patients with Acute Primary Angle Closure Glaucoma

Abstract

Purpose: To investigate the laser peripheral iridotomy (LPI) induced changes on corneal densitometry (CD) in cases with acute primary angle closure glaucoma (PACG) during the post-laser 1 month period. Materials and Methods: This prospective study included 21 eyes with first acute attack of PACG. All the eyes underwent LPI with neodymium: yttrium-aluminum-garnet (Nd:YAG) laser after the intraocular pressure (IOP) decreased to normal levels with maximal anti-glaucoma treatment and complete regression of corneal edema. Central corneal thickness (CCT) and CD values were measured by densitometry software of Pentacam HR-Scheimpflug corneal topography over a 12-mm diameter of the cornea just before and at the first week and first month after LPI. Results: The mean age of 13 female and 8 male cases was 56.6±7.9 years. The IOP during the acute attack was 47.5±4.2 mmHg and it decreased to 19.0±2.8 mmHg after medical treatment before LPI. Both the IOP and the CCT values decreased significantly values at the first week and month after LPI (p