AIM: To investigate the correlation between horizontal corneal diameter(WTW), horizontal anterior chamber diameter(HACD)and horizontal ciliary sulcus diameter(S-S).

METHODS: A total of 62 cases(115 eyes)with high myopia were collected from those who were examined in our hospital from August 2015 to August 2016. Their WTW and HACD were measured with SIRIUS, while S-S was measured with UBM, and the results were compared and analyzed.

RESULTS: In all patients, WTW was 11.91±0.37mm, HACD was 12.45±0.43mm, S-S was 11.78±0.46mm. There was negative correlation between HACD or S-S and age(r=-0.423 and r=-0.386 respectively, all P<0.05). Correlation comparison with central anterior chamber depth(ACD)showed in group with ACD≤3.5mm, WTW and HACD were related with S-S; while in group with ACD>3.5mm, there was no significant correlation between WTW or HACD and S-S.

CONCLUSION: 1)WTW and S-S has better correlation, but due to the influence of age and anterior chamber depth, S-S is recommended to be measured with reference to the UBM to determine ICL when the patient is equal to or over 40 years old or with ACD>3.5mm; 2)SIRIUS Anterior Segment System is safe, simple and repeatability in measuring WTW and HACD.