<unk>  is a thick band of scar tissue in the conjunctiva of the eye, near the lid margin, that is associated with eye infections.<unk>  is a characteristic finding of trachoma, an infection of the eye caused by Chlamydia trachomatis. The line runs horizontally, parallel to eyelid, and is found at the junction of the anterior one third and posterior two thirds of the conjunctiva. The line is named after the Austrian ophthalmologist Carl Ferdinand von<unk> .
Arlt's line
Sampaolesi line
Ohngren's line
Schwalbe's line
Blumensaat's line
Burton's line
Hilgenreiner's line
Birmingham gauge