Quantification of anterior scleral thickness in Posner-Schlossman syndrome.

Purpose: To investigate changes in anterior scleral thickness (AST) in patients with Posner-Schlossman Syndrome (PSS).

Methods: Sixty-two patients with PSS were enrolled. AST was measured using swept-source optical coherence tomography at 0 mm (AST0), 1 mm (AST1), 2 mm (AST2), and 3 mm (AST3) from the scleral spur.

Results: AST0, AST1, AST2, and AST3 were significantly reduced in PSS-affected eyes compared with that in fellow eyes. Furthermore, we divided patients into two subgroups based on the course of PSS: the short-term (PSS course < 1 year) subgroup and the long-term (PSS course ⩾ 1 year) subgroup. In the short-term subgroup, no significant differences in AST parameters (AST0, AST1, AST2, and AST3) were observed in PSS-affected and fellow eyes, while in the long-term subgroup, all the AST parameters (AST0, AST1, AST2, and AST3) were significantly reduced in PSS-affected eyes compared with that in fellow eyes.

Conclusions: PSS-affected eyes demonstrated significantly reduced AST compared with that in fellow eyes. Moreover, a significant reduction of the AST was observed in long-term PSS-affected eyes, but not in short-term PSS-affected eyes. This indicates that changes in AST in PSS are time-dependent and progressive. Significant reduction of the AST is observed only after a certain period of time.