The participants were divided into two groups according to their SFCT. SFCTs less than 300 μm were assigned to the normal SFCT group, while an SFCT equal to or greater than 300 μm was assigned to the thickened SFCT group. The rate of sclerochoroidal interface below and at the same level as the linear artifact line was only 2.2% in participants in the normal SFCT group, such as POAG patients and control subjects, but the rate was upto 20.1% in patients in the thickened SFCT group, such as APACG, PACS, CPACG and CSC patients. The difference between the two groups was statistically significant (p < 0.01).