IMPROVEMENTS TO SPATIAL FREQUENCY AND CONTRAST SENSITIVITY TEST CHART AND PROTOCOL

摘要

Method and apparatus for measuring and quantifying the generalized visual sensitivity in terms of contrast sensitivity to spatial frequency response and recognition by the eye and the brain shapes or image alignments. Several information areas are provided significantly different (A, B, C ... 1, 2, 3), each of these information areas being defined by a pin to prevent the patient or the system to search for an image and to generally denote proximity of the information area for visual query. The information areas (A, B, C ... 1, 2, 3) may contain a grid having light and dark parallel and successive areas that have a substantially linear nature with respect to contrast and / or frequency Space or occurrence size which differs for different data fields. Each successive information areas has a background of which the average brightness is equal to the average of the average luminance of the information area.