AN INTERACTING CONTROL SYSTEMS ANALYSIS OF HUMAN LENS ACCOMMODATIVE CONTROLLER

In this paper a mathematical control systems model of the human lens accommodative controller is derived. The model accounts for the interaction of the pupil with accommodation and thereby becomes a two-loop interacting control system. The lens and pupil dynamical equations are derived from classical muscle mechanics and experiments as well as from experiments performed by the author on cats, primates and humans. The animal experiments represent open-loop identification procedures designed to identify the dynamics of accommodation without neurological control. The human experiments are closed-loop procedures used to verify the overall system responses with the system under neurological control. The resultant systems model is computer simulated assuming a relay-type neurological control for both pupil and lens systems. © 1969.