[Is increased choroidal thickness a risk factor for primary angle-closure glaucoma].

Primary angle-closure glaucoma (PACG) is the main form of glaucoma in China. The pathological mechanism of PACG is not yet well understood. Traditional anatomic disorders are characterized by biometric factors such as shallow anterior chamber depth, narrow anterior chamber angle, short axial length, and thick crystalline lens.Newly found potential risk factors include dynamic changes of iris and choroid.With the development of enhanced depth imaging spectral-domain optical coherence tomography (EDI-OCT) and swept source OCT (SS-OCT), it is possible to measure choroidal thickness accurately.Several studies have found the choroid of PACG eyes was thicker than that of primary open-angle glaucoma (POAG) and normal subject eyes, which suggests that increased choroidal thickness might be another risk factor for PACG.