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palinopsia
palinopsia (ˌpælɪˈnɒpsɪə) or palinopian (Medicine) a visual disorder in which the patient perceives a prolonged afterimage[from Greek palin again + ōps eye]
palinopsia
palinopsia[‚pal·ə′näp·sē·ə] (psychology) A form of pathological afterimagery that is characterized by the hallucinatory persistence of an object after the viewer has turned away. palinopsia
palinopsia [pal″in-op´se-ah] visual perseveration; the pathologic continuance or recurrence of a visual sensation after the stimulus is gone.pa·li·nop·si·a (pa-li-nop'sē-ă), Persistence or recurrence of a visual image after removal of the stimulus.pa·li·nop·si·a (pal'i-nop'sē-ă) Abnormal recurring visual hallucinations. [G. palin, again, + opsis, vision]palinopsia The persistent perception of a visual image for some time after the direction of gaze has been moved so that the original image is superimposed on another. Multiple identical images (polyopia) may be perceived. The cause of this rare symptom remains uncertain but some cases are epileptic phenomena affecting the non-dominant occipito-temporal cortex.palinopsia Visual persistence of the image of an object in the absence of its original stimulus. There is usually a latent period, which may amount to several minutes between the visual stimulation and the corresponding mental image. The latter typically disappears within seconds, although it may persist in some cases for several minutes. The subsequent mental image is quite faithful to the original stimulus. It is usually associated with a lesion in the parieto-occipital or temporal-occipital areas as a result of a cerebral infarction, epilepsy, tumour, or brain injury. Syn. visual perseveration.pa·li·nop·si·a (pal'i-nop'sē-ă) Abnormal recurring visual hallucinations. [G. palin, again, + opsis, vision] |