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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Oculo-Visual Dysfunction in Parkinson's Disease.

R A Armstrong

    Journal of Parkinson'S Disease
    |November 25, 2015
    PubMed
    Summary
    This summary is machine-generated.

    Visual problems in Parkinson's disease (PD) include changes in acuity, contrast sensitivity, and eye movements. Specific visual symptoms can aid in diagnosing PD and related parkinsonian syndromes.

    Keywords:
    PD dementiaParkinsonian syndromesParkinson’s disease (PD)differential diagnosisoculo-visual dysfunctionprodromal phase

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    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Neurology

    Background:

    • Parkinson's disease (PD) and related parkinsonian syndromes often present with complex oculo-visual dysfunctions.
    • Understanding these visual changes is crucial for early diagnosis and management.

    Purpose of the Study:

    • To review oculo-visual problems in Parkinson's disease (PD).
    • To determine if visual symptoms characterize the prodromal phase of PD.
    • To assess if PD dementia is linked to specific visual changes.
    • To evaluate the utility of visual symptoms in differentiating between PD, progressive supranuclear palsy (PSP), dementia with Lewy bodies (DLB), multiple system atrophy (MSA), and corticobasal degeneration (CBD).

    Main Methods:

    • Literature review focusing on oculo-visual symptoms in Parkinson's disease and related disorders.
    • Analysis of visual changes including visual acuity, contrast sensitivity, color discrimination, pupil reactivity, and eye movements.
    • Examination of visuo-spatial orientation, facial recognition, and visual hallucinations.

    Main Results:

    • Oculo-visual dysfunction in PD encompasses visual acuity, contrast sensitivity, color vision, pupil response, eye movements, motion perception, and visual processing.
    • Prodromal PD may feature autonomic dysfunction affecting pupils, abnormal color vision, stereopsis deficits, impaired smooth pursuit, and visuo-motor adaptation issues, particularly with REM sleep behavior disorder.
    • PD dementia exacerbates oculo-visual problems, with eye movement disorders, visuo-spatial deficits, and visual hallucinations being most characteristic.
    • Visual hallucinations, visuo-spatial problems, and saccadic eye movement variations are key diagnostic indicators for differentiating parkinsonian syndromes.

    Conclusions:

    • Oculo-visual symptoms are integral to Parkinson's disease (PD) and its spectrum of related disorders.
    • Distinct visual changes can appear in the prodromal phase and are exacerbated in PD dementia.
    • Visual symptom analysis provides valuable differential diagnostic information for parkinsonian syndromes.