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Wall-eyed viewing requires that the two eyes adopt a relatively parallel angle, while cross-eyed viewing requires a relatively convergent angle. An image designed for wall-eyed viewing if viewed correctly will appear to pop out of the background, whereas if viewed cross-eyed it will instead appear as a cut-out behind the background and may be ...
Strabismus is an eye disorder in which the eyes do not properly align with each other when looking at an object. [2] The eye that is pointed at an object can alternate. [3] The condition may be present occasionally or constantly. [3] If present during a large part of childhood, it may result in amblyopia, or lazy eyes, and loss of depth ...
Esotropia (from Greek eso 'inward' and trope 'a turning' [1]) is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [2]
A third aid is that the viewer goes cross-eyed, and when this is done, the two images appear as three images, due to the lines of sight when cross-eyed. If the viewer focuses on the middle of the three images, it will come into focus as stereoscopic, without any viewing apparatus or use of a finger to get the eyes correctly focused.
Ocular dominance, sometimes called eye preference or eyedness, [1] is the tendency to prefer visual input from one eye to the other. [2] It is somewhat analogous to the laterality of right- or left- handedness ; however, the side of the dominant eye and the dominant hand do not always match. [ 3 ]
When both eyes are properly aligned and aimed at the same target, the visual portion of the brain fuses the two forms from the two eyes into a single image. When one eye turns inward, outward, upward, or downward, two different pictures are sent to the brain. Thus, the brain can no longer fuse the two images coming from the two eyes.
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The Cross of Agadez in 21 modern variations, Niger, 2019. As in other rural Berber traditions, jewellery made of silver, coloured glass or iron is a special artform of the Tuareg people. [109] [110] While in other Berber cultures in the Maghreb jewelry is mainly worn by women, Tuareg men also wear necklaces, amulets and rings.