Haploscope
Ahaploscopeis an optical device for presenting one image to oneeyeand another image to the other eye. The word derives from twoGreek roots:haploieides,single andskopeo,to view. The word is often used interchangeably withstereoscope,but it is more general than that. A stereoscope is a type of haploscope, but not vice versa. The word has more currency in themedicalfield than elsewhere, where it refers to instruments designed to testbinocular vision.These instruments includeWorth's amblyoscopeand thesynoptophore.[1]
Commonly haploscopes employ front-surfacedmirrorsplaced 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 fact, 4 feet) square and a viewing distance for each eye of nearly five meters (16 feet), was constructed byVaeganin about 1975 to researchstereoacuity.[2]The large images allowed very smallretinal disparitiesto be presented.
See also
[edit]References
[edit]- ^Georgievski Z, Kowal L. Evaluating torsion with the Torsionometer, synoptophore, double Maddox rod test and Maddox wing: a reliability study. Australian Orthoptic Journal 1996, 32: 9-12. [Abstract]
- ^Vaegan (1978).Sensory and motor fusion in binocular vision(Thesis). Dissertation Abstracts International.