A summary report of a research effort related to the human visual accommodation system is presented. A theoretical study of the accommodation system was made. Subsequent effort was aimed at the development of specialized instrumentation for experiments designed to lead to understanding the nature of the control system in human accommodation. The necessary instrumentation consisted primarily of: (1) an automatic optometer to measure the state of eye focus, (2) a focus stimulator device to control the apparent optical distance to any target, and (3) a two-dimensional eye tracker. The concepts and designs of the first two instruments have been published in the open literature, but this report contains the first detailed treatment of the Purkinje eye tracker developed under this program. The report also discusses an accommodation lag model to explain the ability of the eye to apparently know the polarity of focus error even though the blur on the retina is to a first-approximation an even function. The interaction of the accommodation and eye movement systems is also discussed, as is the ability to train the visual accommodation system to a surprisingly responsive condition in only a few hours of training.


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    Titel :

    Experimental study of visual accommodation


    Beteiligte:
    Cornsweet, T. N. (Autor:in) / Crane, H. D. (Autor:in)

    Erscheinungsdatum :

    1972-03-01


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Experimental study of visual accommodation Final report

    Cornsweet, T. N. / Crane, H. D. | NTRS | 1968


    Visual-Accommodation Trainer/Tester

    Randle, Robert J., Jr. | NTRS | 1986


    The non-visual in visual accommodation

    Randle, R. J. | NTRS | 1975


    Visual accommodation trainer-tester

    Randle, R. J., Jr. | NTRS | 1983


    Training the visual accommodation system.

    Cornsweet, T. N. / Crane, H. D. | NTRS | 1973