Abstract: A dynamic random-dot stereogram (RDS) pair is produced by amicrocomputerized pseudo RDS generator and displayed on corres ponding left and right oscilloscopes, observed by two eyes respectively. The timeof display of the right RDS pattern delays that of the display of theleft one. 14 subjects with normal stereoscopic vision viewed bystereoscopy, and tolerant delay time in which binocular fusion canproduce clear perception of form in depth was determined. Three experiments were designed to determine the effect of changingspatial parameters of RDS patterns on the limitation of the delay time.The first was the change of size of RDS patterns the second was thechange of disparity type and disparity value and the third was the cha-nge of display position on the oscilloscope. The result indicates that binocular stereoscopic perception can tole-rate a delay of about 50 milliseconds. Changing spatial parameters ofRDS patterns affects tolerant delay time to a certain extent. It suggests that binocular stereoscopic information processing dependson transient visual information storage. In the process of stereopsis, bi-nocular visual information does not deal with short-term and long-termmemory.

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