Traditionally, a keratometry reading of 47 D or above is one possible indicator for keratoconus. Elevation topography is also of use. In particular, when using height maps, the posterior elevation ...

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 ...