An Analysis of Vergence for Perceiving Stereopsis

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We carried out an eye movement analysis when subject perceive a stereoscopic perception by using fundus haploscope and random-dot stereograms(RDSs)for the images. The results obtained from the experiment are shown as follows ;(1)We reconfirm vergence can be observed after the process of maintaining the stereoscopic perception rather than searching the corresponding right and left points.(2)We obtain the results of(1)for stationary RDS as well as dynamic RDS patterns.(3)It seems to be two types of vergence when the fusion occurs ; one promotes the macro fusion for large disparity and the other for small disparity.(4)The viewpoints gather in the neighborhood of the RDS center after the stereoscope perceived for both stationary and dynamic RDS.We displayed continuously four kinds of numeral RDSs and the fixed viewpoints as noise pattern to cancel the fusion to the subject. But we could not cancel the fusion by the fixed view point, or rather seemed to assist the fusion. This is a very interesting result. From now on, we would like to analyze the mechanism of stereoscope perception by setting many kinds of experimental conditions flexibly.