A method and apparatus are presented to address quantitative assessment of visual form discrimination in a subject, where the method comprises the steps of: (1) presenting at least one scene to a subject on a display, said scene comprising a plurality of elements and a background (2) distorting at least one geometric characteristic of at least one (3) modulating the contrast level of the predetermined section of the scene (4) moving the predetermined section relative to the scene, the movement being tracked by said subject via at least one input device (5) receiving feedback from the subject via the input device (6) quantitatively refining the received feedback relative to the scene (7) adjusting at least one distorted geometric characteristic relative to the accuracy of the quantitatively refined feedback (8) calculating the critical threshold parameter for the subject and (9) recording the critical threshold parameter onto a tangible computer readable medium.
