Ocular Biometry in the Subtypes of Angle Closure: An Anterior Segment Optical Coherence Tomography Study - 20/03/13
, Reza Ghaffari a, Yadollah Eslami a, Mahmood Jabarvand a, Reza Zarei a, Massood Mohammadi a, Shan Lin b
Inquiries to Ghasem Fakhraie, Farabi Eye Hospital, Tehran University of Medical Sciences, Qazvin Sq, South Kargar Ave, Tehran, 1336616351, IranAbstract |
Purpose |
To evaluate ocular biometric parameters in different subtypes of angle-closure disease in the Iranian population and compare them with normal eyes.
Design |
Prospective, cross-sectional.
Methods |
In this clinic-based study, 189 eyes of 154 patients consisting of 40 acute angle-closure glaucoma (AACG) eyes, 40 fellow eyes of AACG, 42 chronic angle-closure glaucoma (CACG) eyes, 40 primary angle-closure suspect (PACS) eyes, and 27 normal eyes underwent complete examination including gonioscopy, A-scan biometry, and anterior segment optical coherence tomography. Only 1 eye of CACG, PACS, and control subjects were selected. Main outcome measures included angle opening distance and trabeculo-iris space area at 500 μm from the scleral spur (AOD500, TISA-500), anterior chamber angle, lens vault, lens thickness, anterior chamber depth (ACD), and lens position.
Results |
Anterior chamber angle, AOD500, TISA500, ACD, and lens position were less and lens thickness and lens vault were greater in angle-closure than open-angle eyes. ACD was less in AACG than CACG and PACS (P < .001). It was also less in fellow eyes than PACS eyes (P = .04). Lens vault was highest in AACG eyes, followed by fellow eyes, PACS, and CACG. It was significantly more in AACG eyes than CACG and PACS eyes (P < .001 and P = .007, respectively). No difference was observed between AACG and fellow eyes.
Conclusions |
The anterior segment was crowded in closed-angle compared to open-angle eyes. Higher lens vault may play a role in the development of an acute attack of angle closure.
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Vol 155 - N° 4
P. 664 - avril 2013 Retour au numéro
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