superimposition

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superimposition 

The ability to see two similar images superimposed but not mentally fused. Examples: seeing a bird in a cage with both eyes in a synoptophore when one eye is presented with a bird and the other with a cage; seeing the letter E in a synoptophore when one eye is presented with the letter F and the other with the letter L. See Worth's classification of binocular vision.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
The researchers discovered that study participants acted as if they were superimposing an imaginary two-lobed, or dumbbell-shaped, template over each pair of points.
By superimposing two projections, he puts the photographs in motion, resulting in a flowing rhythm that is suggestive of, and yet is not, film.
This unique personal display enables hands-free access to information such as diagrams, instrumentation, maintenance records, moving maps and interactive training manuals, superimposing the information on the user's view and creating "augmented vision." The Nomad System features full daylight-readability, allowing users to view high contrast images in even the most challenging ambient lighting conditions.