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Fragmentation of Patterned Targets when viewed as Prolonged After-images

Naturevolume 199pages12151216 (1963) | Download Citation



WHEN an object is viewed through some optical system which stabilizes its image on the retina a breakdown of normal vision occurs and the target may disappear1,2. When complex targets are viewed under these conditions disappearances may be partial3, and the fragmentations which occur may consist of distinctly ordered, non-random segments of the original figure4.

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  1. 1

    Ditchburn, R. W., and Fender, D. H., Optica Acta, 2, 128 (1955).

  2. 2

    Riggs, L. A., Ratliff, F., Cornsweet, J. C., and Cornsweet, T. N., J. Opt. Soc. Amer., 43, 495 (1953).

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    Pritchard, R. M., Heron, W., and Hebb, D. O., Canad. J. Psychol., 14, 67 (1960).

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    Pritchard, R. M., Sci. Amer., 204, 72 (1961).

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    Evans, C. R. (in preparation).

  6. 6

    Hebb, D. O., Amer. Psychol., 18, 16 (1963).

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    Barlow, H. B., Quart. J. Exp. Psychol., 15, 36 (1963).

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    Craik, K. J. W., Nature, 145, 512 (1940).

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    Brindley, G. S., J. Physiol., 147, 194 (1959).

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    Brindley, G. S., J. Physiol., 164, 168 (1962).

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    Yarbus, A. L., Biophysics, 2, 683 (1957).

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    Present address: Department of Zoology, The University, Edinburgh,


  1. Department of Physics, University of Reading

    •  & C. R. EVANS


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