EXAM DISPLAY SCREEN This screen displays the topography map or maps if both eyes were photographed. There are numerous options that can be chosen. The simulated K-readings are given at the bottom left of the screen. In addition to the color coded curvature information, data from any point on the map can be obtained by dragging the central cross to the desired position on the map. Hold the mouse button down and drag the cursor to the desired location. As you do this the values at the bottom right of the screen change to indicate the location of the pointer and values at the point of the cursor.