Selective diplopia in Parkinson's disease: A special subtype of visual hallucination?

Diplopia is sometimes reported by patients with Parkinson's disease (PD) without apparent oculomotor disorders. We assessed clinical features and associated oculomotor and perceptual performance in 14 patients (6 male, 8 female) with PD with a peculiar type of selective diplopia. Duplication of...

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Bibliographic Details
Published in:Movement disorders 2007-06, Vol.22 (8), p.1175-1178
Main Authors: Nebe, Angelika, Ebersbach, Georg
Format: Article
Language:English
Subjects:
Adult
Aged
Biological and medical sciences
Brain - pathology
Degenerative and inherited degenerative diseases of the nervous system. Leukodystrophies. Prion diseases
Diagnosis, Differential
Diffusion Magnetic Resonance Imaging
diplopia
Diplopia - epidemiology
Female
hallucination
Hallucinations - diagnosis
Hallucinations - epidemiology
Headache. Facial pains. Syncopes. Epilepsia. Intracranial hypertension. Brain oedema. Cerebral palsy
Humans
Male
Medical sciences
Middle Aged
Nervous system (semeiology, syndromes)
Neurology
Parkinson Disease - epidemiology
Parkinson Disease - genetics
Parkinson Disease - pathology
Parkinson's disease
Severity of Illness Index
vision
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Summary:Diplopia is sometimes reported by patients with Parkinson's disease (PD) without apparent oculomotor disorders. We assessed clinical features and associated oculomotor and perceptual performance in 14 patients (6 male, 8 female) with PD with a peculiar type of selective diplopia. Duplication of images was confined to single objects or persons, occurred repetitively, and lasted few seconds in all subjects. Frequency of episodes ranged from several episodes per day to three episodes per year. In six of seven subjects undergoing comprehensive ophtalmological examination, subtle ocular disorders (heterophoria, strabism, etc.) were found. Nine of 14 patients were suffering from current or previous visual hallucinations and 3 more patients developed hallucinations within 3 years of diplopia onset. Selective diplopia of isolated single objects and persons in PD is possibly related to hallucinosis and minor ocular disturbances seem to be a triggering factor for this peculiar type of misperception. © 2006 Movement Disorder Society
ISSN:0885-3185
1531-8257
DOI:10.1002/mds.21298