The Role of Dynamic Ultrasound Biomicroscopy in defining Laser Treatment in Pigment Dispersion Syndrome/ Pigmentary Glaucoma. A Case Series

Abstract

Background: To assess utility of Dynamic UBM (in light & dark room illuminations) in deciding laser Iridotomy in Pigment Dispersion Syndrome(PDS)/Pigmentary Glaucoma (PG) Method: Prospective interventional cohort study. Eyes with PDS/PG underwent UBM under light & dark by same operator. Presence of Iris Concavity(IC), Iridolenticular Contact(ILC), Iridozonular Contact(IZC) & Irido-Ciliary Process Contact(ICC) were quantified & LASER Iridotomy was advised. Post-LASER, UBM was redone at 4-6 weeks & later. Results: UBM was done in 10 eyes of 6 pts with PDS/PG. 4 eyes (40%-group 1) had IC under light with ILC. In 6 eyes (60%; group2) UBM was redone under dark, picking up IC in 5 eyes (50%). In group 2,5 eyes had ILC (1 eye each with IZC & ICC also).8 of the advised 9 eyes underwent Nd-YAG PI. 6(75%) eyes showed reversal of reverse pupillary block at mean follow up of 11.33wks. Conclusion: UBM in different room illuminations can be useful in deciding LASER treatment in PDS/PG to restore normal iris configuration.