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목적 : To assess long-term changes of anterior segment optical coherence tomography (AS-OCT) features for primary angle closure (PAC) eyes with different mechanisms
방법 : Total 74 eyes from 74 participants with PAC (irido-trabecular contact at least 2 quadrants by non-indent gonioscopy) were enrolled. Serial AS-OCT imagings were performed during 55 months of mean follow-up (f/u) period. Participants were categorized according to their dominant PAC mechanisms determined by their baseline AS-OCT images: 1) pupillary block (PB), 2) plateau iris configuration (PIC), and 3) thick peripheral iris roll (TPIR). Anterior chamber depth (ACD), lens vault (LV), and angle opening distance at 500 micron from scleral spur (AOD) were measured from horizontal cross-sectional AS
결과 : Thirty-nine eyes were classified as PB, 23 eyes as PIC, and 12 eyes as TPIR by baseline AS-OCT images. There were no significant differences in terms of age, gender, spherical equivalent, or axial length among 3 groups. PB group showed shallower ACD and higher LV than PIC or TPIR groups at baseline. Until last follow up, 33(85%), 21(91%), 12(100%) eyes of each three group underwent LPI. In PB group, ACD became shallower and LV became higher, but AOD were stable during the follow up. In the meantime, both PIC and TPIR showed no change in AOD, but LV became greater. LPI affected the change of AC
결론 : Subgroups base on mechanism of PAC showed different change of anterior segment parameters over time. LPI affected those anterior segment parameter changes mainly in PB group.
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