Quantitative Evaluation of Iris Convexity in Primary Angle Closure - 21/08/11
, Takuji Iwawaki, Masashi Kikuchi, Masashi Fujihara, Akihiro Nishida, Yasuo Kurimoto
Inquiries to Atsushi Nonaka, Department of Ophthalmology, Kobe City General Hospital, 4-6, Minatojima-Nakamachi, Chuo-ku, Kobe, 650-0046, JapanRésumé |
Purpose |
In eyes with primary angle closure (PAC), we quantitatively evaluated anterior bowing of the iris by means of ultrasound biomicroscopy (UBM).
Design |
Retrospective, observational, and consecutive case series.
Methods |
A total of 203 phakic eyes with PAC that had not undergone any surgical or laser treatment were included. Using UBM, we measured anterior chamber depth (ACD) and iris convexity (IC): the maximum distance from the posterior surface of the iris to the iris plane passing through the pupillary margin of the iris and iris root.
Results |
The average IC was 0.22 ± 0.1 mm, although there was considerable individual variation. The IC value was correlated weakly, albeit significantly, with age (r = 0.22, P < .01), and strongly with ACD (r = −0.57, P < .0001).
Conclusions |
In eyes with PAC, older age and a more shallow ACD appear to be important causes of increased forward bowing of the iris resulting from pupillary block.
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Vol 143 - N° 4
P. 695-697 - avril 2007 Retour au numéro
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