Long ciliary processes with no ciliary sulcus and appositional angle closure assessed by ultrasound biomicroscopy

Autor: Roberto Freire Santiago Malta, Luisa Trancoso, Marcelo Hatanaka, Viviane Mayumi Sakata, Julio De Leon Ortega, Kenji Sakata, Lisandro Massanori Sakata, Remo Susanna
Rok vydání: 2006
Předmět:
Zdroj: Journal of glaucoma. 15(5)
ISSN: 1057-0829
Popis: PURPOSE Nonpupil block mechanisms and appositional angle closure after laser iridotomy (LI) have been reported as common findings in Asians. We evaluated the presence of these findings in a cohort of Brazilian patients using ultrasound biomicroscopy (UBM). METHODS This observational case-control study included 22 open angle eyes and 31 eyes with occludable angles on gonioscopy (defined by 2 examiners). UBM radial scans through a typical ciliary process were obtained in both light and dark conditions, at 6 and 12-o'clock positions. Long ciliary processes with no ciliary sulcus were determined on the basis of a reference line drawn perpendicular to the iris plane passing through a point located 750 mum from scleral spur. Trabecular ciliary processes distance was measured on 6-o'clock UBM images. RESULTS After LI, 52% of occludable angle eyes had appositional angle closure in both 6 and 12-o'clock UBM images. We also observed this finding in 14% and 23% of the control eyes (in 6 and 12-o'clock UBM images, respectively). A long ciliary process with no ciliary sulcus was observed in 61% of occludable angle eyes, and also in 32% of control eyes (6-o'clock UBM images). Control eyes had longer trabecular ciliary processes distance than occludable angle eyes (P
Databáze: OpenAIRE