Abstract
Continuous measurements of the motion of the cat lens in response to ciliary ganglion stimulation have been made for step and sinusoidal changes in stimulation rate. The lens responses of five cats are averaged to arrive at representative, continuous recordings relating lens motion and stimulation rate. A mathematical model is constructed using the step response data as a basis and various dynamic and static system nonlinearities are thereby identified. The sinusoidal data is used as a further check on the general validity of the model. Comparison of the model with experimental results reported by others would indicate the accommodative system in cats is highly damped; exhibits both ciliary muscle and lens dynamics and uses both lens deformation and rigid body translation to change the refractive state of the eye.
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