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Changes in Anterior Segment Morphology of Iris Bombe before and after Laser Peripheral Iridotomy in Patients with Uveitic Secondary Glaucoma

Purpose. To quantify changes in anterior segment (AS) parameters after laser peripheral iridotomy (LPI) using AS-optical coherence tomography (OCT) of iris bombe. Method. AS images of eight eyes were captured before and after iris bombe and more than 2 weeks after LPI (post-LPI) using AS-OCT. We com...

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Detalles Bibliográficos
Autores principales: Ikegawa, Wakako, Suzuki, Takashi, Namiguchi, Koji, Mizoue, Shiro, Shiraishi, Atsushi, Ohashi, Yuichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5107836/
https://www.ncbi.nlm.nih.gov/pubmed/27872755
http://dx.doi.org/10.1155/2016/8496201
Descripción
Sumario:Purpose. To quantify changes in anterior segment (AS) parameters after laser peripheral iridotomy (LPI) using AS-optical coherence tomography (OCT) of iris bombe. Method. AS images of eight eyes were captured before and after iris bombe and more than 2 weeks after LPI (post-LPI) using AS-OCT. We compared the following AS parameters: anterior chamber depth (ACD), anterior chamber volume (ACV), iris curvature (IC), iris thickness at 500 μm from the scleral spur (IT-1) in the middle between the iris root and pupillary margin (IT-2) and 500 μm from the pupillary margin (IT-3) to the anterior chamber angle (ACA) (angle opening distance [AOD750]), and trabecular iris space area. Results. Mean IT-1 and IT-3, but not IT-2, were lower after iris bombe (IT-1, P = 0.001; IT-2, P = 0.081; and IT-3, P = 0.001). There were no significant differences between ACD at pre-LPI and before iris bombe (P = 0.096). The mean ACV and AOD750 of iris bombe increased at post-LPI (ACV, P < 0.01, and AOD750, P < 0.05). The mean IT-1, IT-2, and IT-3 increased at post-LPI (all, P ≤ 0.01). IC decreased at post-LPI (P < 0.001), and ACD at post-LPI did not change. Conclusions. The iris extends and becomes thinner during iris bombe. LPI during bombe decreases the IC and increases the ACV and ACA.