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Title: Pseudophakic angle-closure from a Soemmering ring
Authors: Yanin Suwan
Bayasgalan Purevdorj
Chaiwat Teekhasaenee
Wasu Supakontanasan
Pornchai Simaroj
Mahidol University. Faculty of Medicine, Ramathibodi Hospital. Department of Ophthalmology
Keywords: Open Access article;Soemmering ring;Angle-closure;Pseudophakic angle-closure;Cataract;Ultrasound biomicroscopy
Issue Date: 2016
Citation: BMC Ophthalmology. Vol. 16, (2016), 91
Abstract: Background: Report of three patients with pseudophakic angle-closure from a Soemmering ring. Three mechanisms of the Soemmering ring induced pseudophakic angle-closure in three patients were demonstrated by meticulous anterior segment examination and ultrasound biomicroscopic (UBM) analysis. Case presentation: In the first case, the Soemmering-capsule-IOL complex caused relative pupillary block similar to a phakic eye and was successfully treated with laser iridotomy alone. In the second case, an enlarged Soemmering ring provided posterior iris support in apposition to the anterior chamber angle. We performed a laser capsulotomy through the iridotomised hole. The last, a protruding Soemmering content causing absolute pupillary block became resolved after laser iridotomy and total Soemmering ring content removal. Conclusion: Angle-closure in pseudophakic eyes is uncommon. Several causes have been reported in the literatures including Soemmering ring. This is the first report on three different mechanisms of Soemmering ring related angle-closure in pseudophakic eyes. Ultrasound biomicroscopic analysis plays a crucial role as a diagnostic tool.
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