Angle closure is well documented to be more severe in dilation [1, 2]. In addition, many anatomical and physiological factors associated with dilation may also contribute to severity of angle-closure. For example, population-based studies have shown that the prevalence rates of primary angle closure glaucoma (PACG) are relatively high among Asian population, particularly older women. Three potential causes for dilation-induced angle-closure have been reported: iris volume change (or lack thereof), posterior location of the dilator muscle, and (dynamic) pupillary block.
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Contribution of Different Physiological and Anatomical Factors to the Anterior Chamber Angle During Pupil Dilation
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Jouzdani, S, Amini, R, & Barocas, VH. "Contribution of Different Physiological and Anatomical Factors to the Anterior Chamber Angle During Pupil Dilation." Proceedings of the ASME 2012 Summer Bioengineering Conference. ASME 2012 Summer Bioengineering Conference, Parts A and B. Fajardo, Puerto Rico, USA. June 20–23, 2012. pp. 1175-1176. ASME. https://doi.org/10.1115/SBC2012-80453
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