NNN.2 Corneal Topography Scales and Color Palettes
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## NNN.2 Corneal Topography Scales and Color Palettes

The method for presenting corneal topography maps with pseudo-colored images has been studied extensively. Contour maps are effective for diagnostic purposes. The proper scaling is important so that clinically important detail is not obscured as well irrelevant detail masked. This can be done with a scale that has fixed dioptric intervals. The choice of color palette to represent different levels of corneal power is equally important. There must be enough contrast between adjacent contour colors to provide pattern recognition; it is the corneal topography pattern that is used for clinical interpretation. A color palette can be chosen so that lower corneal powers are represented with cooler colors (blue shades), while higher corneal powers are represented with the warmer colors (red shades). Green shades are used to represent corneal powers associated with normal corneas. The standard scale is shown in Figure NNN.2-1.

Figure NNN.2-1. Scale and Color Palette for Corneal Topography Maps

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