What does corneal topography tell you?

Corneal topography produces a detailed, visual description of the shape and power of the cornea. This type of analysis provides your doctor with very fine details regarding the condition of the corneal surface. These details are used to diagnose, monitor, and treat various eye conditions.

How do you read a corneal topographic map?

Warmer colors represent steeper corneal curvature while cooler colors represent flatter areas. For the elevation maps (anterior and posterior float), warmer colors denote where the cornea is elevated above the best fit sphere and cooler colors denote where the cornea is depressed below the best fit sphere.

Is Index corneal topography?

Indices for assessing irregularities in the corneal surface. The main use of corneal topography is the generation of indices that allows quantification of the level of irregularity of the corneal morphology, at a local or general level.

How much does corneal topography cost?

How Much Does a Computerized Corneal Topography Cost? On MDsave, the cost of a Computerized Corneal Topography ranges from $37 to $65. Those on high deductible health plans or without insurance can save when they buy their procedure upfront through MDsave.

Which is the best way to view corneal topography?

The most traditional way to view a topography image is with the axial display map (Figure 1). One positive of this map is that it is the best way to get a quick overview of the corneal power.

Which is the most sensitive power map for cornea curvature?

The most sensitive of the power maps are tangential display maps, and as such, they measure power and curvature at individual points on the cornea the most accurately. Often, a lens fitter must be aware of the precise changes to the corneal curvature when making clinical decisions.

How can you tell the shape of the corneal surface?

The shape of the corneal surface can be inferred by inspection of these mires. Similar to a topographic map of a mountain, areas where the mires appear closer together correspond to steeper corneal curvature. Areas where the mires are more widely spaced are flatter. The mires can also give information regarding the quality of the surface.

What is the normal thickness of the cornea?

White values indicate a normal cornea. Parameters. The central circle on the elevation map is 5 mm; using the toric ellipsoid mode, values greater than 12 µm on the anterior elevation map and 15 µm on the posterior elevation map are considered abnormal. Thickness map. The BAD is also useful when inter- preting the thickness map.