Depth differences of images of stereogram by changing size of vergence recognizing

Abstract

There are big differences in recognizing images between them when we see a stereogram under both conditions of crossed looking and uncrossed looking. The differences are kept, even when we see the stereogram by setting prism wear to one eye. This fact suggests that the differences are not caused in imbalance of centripetal code of eye muscles occurred by sizes of vergence. Therefore we propose that the differences are make on one of visuo-spatial coordinates acquired postnatally, suggesting top-down mechanism.