AIM: To observe the interocular symmetry of primary angle-closure suspects'(PACS)parameters using IOL Master.

METHODS: A cross-sectional observational study. Totally 112 eyes from 56 subjects were enrolled to detect the difference of the bilateral axial length(AL), anterior chamber depth(ACD)and white to white distance(WTW), and to evaluate the correlation between the interocular differences of △AL, △ACD and △WTW and age, gender.

RESULTS: All the parameters were analyzed by paired-samples t test and there were no significant interocular difference(P>0.05). There was no relation of ΔAL,ΔACD and ΔWTW with age and gender.

CONCLUSION: Interocular symmetry of parameters by IOL Master was observed in PACS, and we found that the symmetry would not be altered when the age and gender had changed.