Gonioscopic Appearance of a Normal Anterior Chamber Angle. (1) Pupillary border: (2) Peripheral iris, a-insertion, b-curvature, c-angular approach; (3) Ciliary body band; (4) Scleral spur; (5) Trabecular meshwork, a-posterior, b-mid,c-anterior; (6) Schwalbe's line; (*) Corneal optical wedge.