A method for isolating and quantifying impairments of a subjects gaze stabilization system is provided. A subjects static visual acuity is measured to arrive at an assessment. The subjects visual acuity is then measured when the subjects head is moving and a display object is fixed to arrive at a first dynamic measurement. The subjects visual acuity is also measured when the subjects head is fixed and the display object is moving to arrive at a second dynamic measurement. The assessment and the first and second dynamic measurements are then used to determine an impairment of the subjects gaze stabilization system.
