The present invention provides an apparatus for evaluating otolith dysfunction through the subjective horizontal and vertical testing (SHVT) of a patient. The present apparatus includes a projector adapted to project a luminous line on a test wall of a test room at an initial predetermined position, a controller operated by a patient that adjusts the position of luminous line w.r.t. patient's input. The said input is analyzed by a computing system included in present apparatus which computes subjective visual parameters of patient based on the said input. The subjective visual parameters are calculated by distinguishing deviation of the luminous line (patient's input) from the predetermined reference position. This reference position is installed in the computing device and not visible to the patient. Further, the projector is adapted to add a static, dynamic or real life background.
