Abstract: A method and apparatus for increasing visual acuity of a person wherein a target is selectively moved toward or away from the person to different positions at accurately determined distances therefrom. At each of the positions, the person is required to identify the appearance of the target which is randomly changed to any one of a plurality of different appearances. The concept includes the moving of the target further away from the person whenever the identification of the target appearance is correct at a given position and moving the target closer to the person whenever the identification is incorrect. The invention comprehends moving the target incrementally at smaller distances away from the person than toward the person. A Badal lens is interposed between the person and the target for causing the focal points to be at the nodal point of the eye of the person.