Bender’s work further described polyopia through the documentation of four individuals with the disease. Giovanni Mingazzini, who described the disease in relation to an occipital lobe injury. Additional differences between patients include but are not limited to the following the number of duplicated images which can reach up to hundreds of images, the distance between the target stimulus and the duplicated images, the size and colour of the duplicated images compared to the original, and duration of time in which the duplicated images remains.Ĭerebral polyopia was first reported in 1908 by Dr. When only two images are observed, the original and the duplicate, the phenomenon is labeled as cerebral diplopia, a subtype of cerebral polyopia. The presentation of the duplicated image(s) varies between patients. Additionally, it does not improve with pinhole distinguishing it from ocular abnormalities such as cataract and refractive error. In other words, there is persistence of two or more duplicated images even after the stimulus is removed.Ĭerebral polyopia, which is an extremely rare phenomenon, occurs even with monocular viewing of each eye, distinguishing it from strabismic diplopia, but disappears when the stimulus is removed. There are three different types of visual perseveration which can occur in isolation or in combination llusory visual spread in which the visual image is not contained within its spacial boundary, palinopsia in which there is perseveration of a visual image in time, and Cerebral Polyopia, also known as Cerebral Diplopia, in which there is perseveration of a visual image in space, resulting in the perception of multiple images from a single visual stimulus. Visual perseveration is a positive visual phenomenon in which the visual image either recurs, persists, or is duplicated.
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