Abstract
In this paper, we report the results of estimating the minimum frequency of alternative left-right stereopair image presentation necessary to obtain stereopsis in children with ophthalmopathology including or not including binocular disorders. It was found that all subjects without binocular disorders had stereo-effect with linear as well as with random-dot images. However, for stereopsis with random-dot stereotests, all children needed higher frequency of alternation than for stereopsis with simple linear images. It appeared that about 90% of children with binocular disorders were capable to perceive depth when simple linear stereoscopic images were presented alternatively to the two eyes. However, these patients needed a higher frequency of alternation than children with normal binocular functions. Only a small part (about 30%) of children with binocular disorders was capable to stereopsis with complex random-dot images and they needed rather high frequency (more than 30 Hz) of alternation for success.
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