Patent US 4,533,221

Methods and apparatus for performing accommodation training under clinical conditions are provided in accordance with the teachings of the present invention. An infrared optometer is employed to measure a patient's accommodation and outputs therefrom are employed to generate tone information and viewable patient information indicative of the state of focus in a rapid manner. A patient is trained at an empirical rate determined by the viewable information until a predetermined proficiency in the voluntary control of accommodation is achieved. Thereafter, stimuli to accommodation, the accommodation convergence reflex and blur cue information are selectively introduced to generalize the voluntary control of accommodation achieved to a conventional environment so that the same may serve to reduce various visual acuity problems in a patient being trained.