ABSTRACT
Objective To observe the positional variation of the ciliary body in eyes with acute primary angle-closure glaucoma (APACG) by ultrasound biomicroscopy (UBM),and to analyze the association between anterior chamber angle width and location parameters of the ciliary body in patients with APACG.Methods The subjects were divided into APACG group and normal control group and examined by UBM,and the clearer images were collected for quantitative analysis,followed by measurement of parameters including angle open distance 500 (AOD500),trabecular meshwork-ciliary process distance (TCPD),iris-ciliary process distance (ICPD),sclera-ciliary process angle (SCPA) and ciliary body length 500 (CBL500).Results Totally 89 patients (89 eyes) were enrolled in this study,including 57 patients with APACG (APACG group)and 32 normal controls (normal control group).According to the age-sex paired t test,the average of 23 pairs of measured data showed that the AOD500,TCPD,ICPD,SCPA,and CBL500 were (0.050 4 ± 0.031 0) mm,(0.499 6 ± 0.192 4) mm,(0.112 6 ± 0.089 2)mm,(35.317 0 ±4.575 2)° and (1.060 4 ±0.290 2)mm in the APACG group,and (0.242 6 ±0.078 5)mm,(0.741 7 ±0.240 4) mm,(0.272 6 ±0.218 8) mm,(44.913 0 ±10.089 2) ° and (0.633 0 ± 0.405 4)mm in the normal control group,respectively;and APACG group presented smaller AOD500,TCPD,ICPD and SCPA but larger CBL500 than normal control group,with significant differences (all P ＜ 0.01).Correlation analysis showed that TCPD,ICPD,SCPA and CBL500 were significantly correlated with AOD500 in APACG group.Conclusion Ciliary bodies are more anteriorly rotated in eyes with APACG,and anterior chamber angle width is associated with location parameters of ciliary body.