- Haploscope
A haploscope is an optical device for presenting one image to one
eye and another image to the other eye. The word derives from twoGreek root s: "haploieides", single and "skopeo", to view. The word is often used interchangeably withstereoscope , but it is more general than that. A sterescope is a type of haploscope, but not vice versa. The word has more currency in the medical field than elsewhere, where it refers to instruments designed to testbinocular vision . These instruments includeWorth's amblyoscope and thesynoptophore .Commonly haploscopes employ front-surfaced
mirror s placed at different angles close to the eyes to reflect the images into the eyes. Reputedly the largest haploscope, with images of over a meter in diameter and a viewing distance for each eye of over three meters, was constructed byVaegan in about 1975 to researchstereoacuity (see Vaegan, 1978). The large images allowed very small retinal disparities to be presented.References
Vaegan (1978). Sensory and motor fusion in binocular vision. "Dissertation Abstracts International, 39"(2-B), 1034.
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