<unk>  is a sign which may be observed during a clinical eye examination. During gonioscopy (where the structures of the eye's anterior segment are examined), if an abundance of brown pigment is seen at or anterior to Schwalbe's line, a<unk>  is said to be present. The presence of a<unk>  can signify pigment dispersion syndrome or pseudoexfoliation syndrome. Gonioscopy is performed during eye examinations, which involves placing a mirrored lens on the patient's cornea in order to visualise the angle of the anterior chamber of the eye.
Sampaolesi line
Arlt's line
Birmingham gauge
Ohngren's line
Schwalbe's line
Blumensaat's line
Burton's line
Khodadoust line