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Visual perception: here's mud in your mind's eye.

We appear to be unaware of large changes in our visual scene if our attention is temporarily diverted. This suggests that the rich, complete visual scene that we appear to have may be just an illusion.

Animals↗

Testing visual perception of three-dimensionally moving objects (dynamic stereoscopy).

In the past decade, visual requirements in the field of stereoscopy have considerably increased in a number of professions, as well in present-day traffic and sports. As a result of a statement of the WHO (1984) viz. that for prevention of accidents the testing of static vision only is insufficient, and that dynamic vision too should be a subject of investigation, a test for measuring dynamic stereoscopic visual acuity has been devised. With the help of two synchronously rotating prisms, a stereo test consisting of four bars is transposed into an apparent circumduction movement which is presented at different velocities. Stereoscopy under static and dynamic conditions do not run a parallel course. Dynamic stereoscopy is significantly influenced by age, but not by sex.

Adult↗