Superficial lines and associated disorders of the cornea.

In a clinical classification of fine superficial corneal lines, we recognized five major types of line: mare's tail lines, fibrillary lines, fingerprint lines, lacunar dystrophy or map-like changes, and tram lines. The fingerprint lines were further classified into several subgroups. There was a relationship between certain lines, in particular, fingerprint lines and lacunar dystrophy or map-like change with the occurrence of Cogan's microcystic dystrophy and recurrent erosion.