COMPUTERIZED VIDEOKERATOSCOPES DATA DISPLAY

            Curvature Maps

The maps can be displayed on an absolute 
or a relative scale.  The absolute scale is 
a set dioptric difference between colors 
which covers the whole range of normal 
corneal curvatures.  With the relative 
scale setting, the upper and lower values 
are determined by the steepest and 
flattest values for the particular cornea 
being evaluated.   The relative maps have 
smaller differences between color steps.

The relative scales are best to see 
differences at different parts on the 
cornea or to compare the maps of the 
same eye at different points in time.

The absolute scales are useful when 
comparing a number of different eyes 
since the same color on every map 
represents the same dioptric value.