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Clinical features of Zinn's membrane damage in acute angle closure Yukiya Takeichi 1 , Teruyo Tanabe 1 , Yoshimichi Hirota 1 , You Tamagaki 1 , Momoko Yamakawa 1 , Shinsuke Miyahara 1 1Medical Research Institute KITANO HOSPITAL, PIIF Tazuke-kofukai pp.1191-1196
Published Date 2023/9/15
DOI https://doi.org/10.11477/mf.1410214912

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Abstract Objective:To investigate the clinical features of Zinn's membrane damage in acute angle closure.

Subjects and Methods:A retrospective study of 36 eyes of 31 patients with acute angle closure who visited our department between January 2017 and January 2022. Thirty-four eyes that underwent primary or secondary cataract surgery were classified into the high-risk group(18 eyes)and low-risk group(16 eyes)depending on the intraoperative ciliary zonule damage and intraocular lens(IOL)fixation. Preoperative background factors, ultrasound biomicroscopy or anterior segment optical coherence tomography(OCT)findings of the angle, central anterior chamber depth(ACD), and axial length were compared between the two groups.

Results:Intraoperative Zinn's membrane damage was observed in 27 of 34 eyes, 12 of which underwent in suture fixation of an IOL. The most common site of zonular dialysis was the temporal side. 8 of 18 eyes in the high-risk group had either a history of trauma, exfoliation syndrome, or regional differences in angle findings. Compared with the low-risk group, the high-risk group showed a significantly shallower ACD(1.21 mm vs 1.46 mm), larger difference in the ACD of fellow eyes(1.05 mm vs 0.33 mm), and longer axial length(23.8 mm vs 22.2 mm).

Conclusions:Zinn's membrane damage is not uncommon in eyes with acute angle closure. The evaluation of ACD, the difference between the ACD of fellow eyes, and axial length may be useful for predicting Zinn's membrane damage.


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