Fig. 1

Diagrammatic representation of the UBM measurements of ciliary body parameters. Iris-ciliary angle (ICA) is the angle between the posterior iris surface and the anterior surface of ciliary body; trabecular-ciliary angle (TCA) is measured with the scleral spur as the apex and the corneal endothelium and the anterior surface of ciliary body as the arms of the angle; trabecular ciliary process distance (TCPD) is defined as the length of the line extending from the corneal endothelium 500 μm from the scleral spur perpendicularly to the line which passing through the most inner point of ciliary body and parallel to the iris; maximum ciliary body thickness (CBTmax) is the distance from the most inner point of the ciliary body to the inner wall of scleral or its extended line; ciliary process length (CPlength) was measured as the distance from the inner point of ciliary body to the intersection point of the iris and ciliary body