AIM:To investigate biological measurement parameters of anterior segment in acute angle-closure glaucoma(AACG).

METHODS: Forty-six eyes of 46 patients with AACG and 52 eyes of 52 patients with shallow anterior chamber and 50 eyes of 50 normal individuals were examined. The parameters of anterior segment including chamber crowd rate(CCR), lens thickness(LT), lens position(LP)and anterior chamber depth(ACD)were measured by A-ultrasound according to different ages in each group. The data were performed statistical analysis in three groups.

RESULTS: In each age range group(≥50～59 years old, ≥60～69 years old, ≥70 years old), statistically significant differences in three groups(AACG, shallow anterior chamber group and the controls)were found in CCR, LT, LP, ACD(P<0.01). There were statistically significant differences only in CCR(P<0.01)but not in LT,LP and ACD(P>0.05)between AACG and shallow anterior chamber group in each age range group.

CONCLUSION: CCR can be used as the index of evaluating crowding state of anterior segment in AACG patients and the sensitivity is better than LT and LP.