Abstract
An optoelectronic device able to change the gain of the retinal feedback path from its natural value (−1) to any other value in the range −5, +5 is presented. The employement of an image-converter tube with coupled magnetic deflection circuit allows a large variety of targets to be used. Any type of artificial movements, moreover, can be imposed to the target itself. The device can be driven by any eye movement detector able to transduce the horizontal and vertical components of the eye rotation in the form of electrical signals. Experiments were performed to investigate the effects of varying the gain of the retinal feedback loop on the eye behaviour. Evidence was found for the existence of a range of values of such gain where the eye goes into spontaneous smooth sinusoidal-like oscillations. This phenomenon was examined with the control theory methods in terms of stability of the pursuit system. A correlation between the spontaneous oscillations and the well known learning capability of the visual system was found.
Similar content being viewed by others
References
Bach-y-Rita,P., Collins,C., Hyde,J.: The control of eye movements. New York: Academic Press 1971
Dallos,P.J., Jones,R.W.: Learning behaviour of the eye fixation control system. IEEE Trans. Autom. Control AC8, 218–227 (1963)
Ditchburn,R.W., Ginsborg,B.L.: Vision with a stabilized retinal image. Nature 170, 36–37 (1952)
Fender,D.H., Nye,P.W.: An investigation of the mechanism of eye movement control. Kybernetik 1, 81–88 (1961)
Hedlun,J.M., White,C.T.: Nystagmus induced by visual feedback. J. Opt. Soc. Amer. 49, 729–730 (1959)
Heywood,S., Churcher,J.: Eye movements and the afterimage. I. Tracking the afterimage. Vision Res. 11, 1163–1168 (1971)
Palmieri,G., Oliva,G.A., Scotto,M.: C.R.T. spot-follower device for eye movement measurements. Kybernetik 8, 23–30 (1971)
Riggs,L.A., Ratliff,F., Cornsweet,J.C, Cornsweet,T.N.: The disappearance of steadily fixated visual test objects. J. Opt. Soc. Amer. 43, 495–501 (1953)
Riggs,L.A., Tulunay,S.U.: Visual effects of varying the extent of compensation for eye movements. J. Opt. Soc. Amer. 49, 741–745 (1959)
Robinson,D.A.: The mechanics of human smooth pursuit eye movement. J. Physiol. 180, 569–591 (1965)
Smith,K.U., Putz,V.: Dynamic motor factors in determining effects of retinal image feedback reversal and delay. Amer. J. Optom. 47, 372–383 (1970)
Stark, L., Vossius, G., Young, L.R.: Predictive control of eye tracking movements. IRE Trans. Human Factors Electron. MFE-3, 52–57 (1962)
Stark,L.: Neurological control systems. Studies in bioengineering. New York: Plenum Press 1968
St Cyr,G.J., Fender,D.H.: Nonlinearities of the human oculomotor system: Time delays. Vision Res. 9, 1491–1503 (1969)
St Cyr,G.J., Fender,D.H.: Nonlinearities of the human oculomotor system: Gain. Vision Res. 9, 1235–1246 (1969)
Steinbach,M.J., Pearce,D.G.: Release of pursuit eye movements using after-images. Vision Res. 12, 1307–1311 (1972)
Sugie,N.: A model of predictive control in visual target tracking. IEEE Trans. Systems, Man, Cyb. Vol. SMC-1, 2–7 (1971)
Ten Doesschate,J.: A new form of physiological nystagmus. Ophtalmol. 127,65–73 (1954)
Young,L.R., Stark,L.: Variable feedback experiments testing a sampled data model for eye tracking movements. IEEE Trans. Hum. Factors Electron, MFE 4, 38–51 (1963)
Zworykin,V. K., Morton,G.A.: Applied electron optics. J. Opt. Soc. Amer. 26, 181 (1936)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Palmieri, G., Scotto, M. & Oliva, G.A. Image-converter pattern tracker for variable retinal feedback experiments. Kybernetik 15, 193–202 (1974). https://doi.org/10.1007/BF00277495
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00277495