Elevation Map. The elevation map displays corneal ... Several quantitative indices have been developed to aid in the topographic diagnosis of keratoconus. Pellucid Marginal Degeneration.

On this report we see a familiar topography, a pachymetric assessment of the entire cornea and maps of what ... Patients with keratoconus will often have zones of positive elevation that ...

It is known that posterior corneal elevation is an early presenting sign of keratoconus ... these four surfaces are used to create a topographic map. Each surface point from the diffusely ...