Evaluation and measurement of ocular fixation disparity and if necessary, recommending vision therapy or additional optical correction.

The disparity of fixation is the inaccurate intersection of the axes of vision in the presence of fusion and in the associated conditions, which is resulted from over- or underconvergence of the eyes. Binocular vision under associated conditions is assessed by measuring fixation disparity. Both objective and subjective fixation disparities are measured. With the Hoya EyeGenius measuring system, it is possible to measure the magnitude of the fixation disparity and as a result, the device calculates the prism correction required for the patient.