A method and system are presented to address quantitative assessment of word recognition sensitivity of a subject, where the method comprises the steps of: (1) presenting at least one scene to a subject on a display, the scene comprising a plurality of letters and a background (2) distorting the scene (3) moving plurality of letters relative to the scene, the movement being tracked by the subject via at least one input device (4) receiving feedback from the subject via the input device (5) quantitatively refining the received feedback (6) modulating the movement of plurality of letters relative to accuracy of the received feedback (7) calculating a critical threshold parameter and (8) recording a critical threshold parameter onto a tangible computer readable medium.
