Ocular biometric characteristics of acute and chronic primary angle-closure glaucoma in Chinese patients.

To compare the ocular parameters of acute angle closure glaucoma (AACG) and chronic angle closure glaucoma (CACG).Totally 106 patients with primary angle closure glaucoma were recruited: 58 patients with AACG and 48 with CACG. All patients were divided into 3 groups: AACG attack eyes group, AACG uninvolved fellow eyes group and CACG group and underwent the same ophthalmic examinations, comprising optometry, keratometry, and A-scan ultrasonography. The lens/axial length factor (LAF) and relative lens position (RLP) were calculated.The AACG attack eyes had a significant shallow anterior chamber depth, thick lens, short axial length and larger LAF. There tended to be a reduction in the percentage of LAF>0.20 in AACG attack eyes, CACG eyes and AACG uninvolved fellow eyes, though there were no statistically significant difference in all groups (P>0.05).The eyes with AACG attack have a more crowded anterior chamber structure compared with uninvolved fellow eyes and eyes with CACG.