The Effect of Laser Iridotomy on the Anterior Segment Anatomy of Patients With Plateau Iris Configuration

Abstract

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.

Double Hump Sign in Indentation Gonioscopy is Correlated With Presence of Plateau Iris Configuration Regardless of Patent Iridotomy

“…4 UBM is useful in determining the structural cause of angle-closure glaucoma syndromes, and in differentiating a plateau iris from a pupillary block. 2 However, not all eye clinics are equipped with a UBM.…”

High Prevalence of Plateau Iris Configuration in Family Members of Patients With Plateau Iris Syndrome

“…The patients with reported refractive errors in their series ranged in age from 49 to 63 years with an average age of 57.6 ± 7.0 years with only 1 patient younger than 50 years. 6 Past studies hypothesized that the configuration is caused in part by an anteriorly placed ciliary process that bolsters the iris up against the trabecular meshwork. 7,8 Despite understanding the anatomic relationship, we know little about the pathogenesis.…”

Appositional Angle Closure in Chinese With Primary Angle Closure and Primary Angle Closure Glaucoma After Laser Peripheral Iridotomy

“…14,16 However, the diagnostic criteria for plateau iris are not well defined. 14,15,[17][18][19] Using their diagnostic criteria in UBM, Kumar et al 14,20 found plateau iris ( ‡2 quadrants) in 32.4% of PACG eyes after patent LPI. We used criteria similar to those of Kumar et al 14,20 and found plateau iris ( ‡2 quadrants) in only 9.7% (13 of 134) subjects.…”