Experimental examination of the accommodative responses to a stereoscopic 3-D display found that accommodation was elicited by convergence and moved to the stereoscopic distance of the 3-D image. Immediately after the depth of the target was changed, the magnitude of response was smaller than that for a real target, but when the subjects fixated on the 3-D images, the responses were in almost the same position as the position of 3-D images. Measurement of accommodation response time after the subjects viewed 3-D images showed an afteraffect on the far-to-near accommodation response. The results are discussed in terms of the mismatch of accommodation and convergence in stereoscopic 3-D images and of the interaction between accommodation and convergence in human eyes.
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