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Role of Retina in Mechanisms of Illusions and Visual Hallucinations Observed in Idiopathic Parkinson's Disease

NCT03454269 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 90

Last updated 2019-03-13

No results posted yet for this study

Summary

Parkinson's disease is characterized not only by motor symptoms but also by psycho-behavioral symptoms including Visual Hallucinations (VH) and illusions (I), that are generally associated with a severe functional impairment and a bad prognosis for patients. Visual Hallucinations are defined by a visual perception without any real objet to perceive, whereas illusions are defined by a wrong perceptions of an object that is really present. In most of studies investigating the pathophysiology of VH in PD, no difference is made between VH and I, however different mechanisms could lead to the emergence of these two phenomenon, with different prognosis.

Investigator hypothesize that illusions could be related to a visual impairment, maybe at the retinal level, known to be impaired in PD, whereas Visual hallucinations would be due to a more widespread impairment affecting higher levels visuo-perceptive and cognitive functions.

Conditions

Interventions

DIAGNOSTIC_TEST

Optical Coherence Tomography

The Optical Coherence Tomography is a painless analysis without contact with the eye. Patients are sitting in front of the machine. Each eye is analyzed. By a laser scanning system, longitudinal sections of the retina are made at the level of the macula and the optic nerve. The device automatically segments the different layers which are then measurable (in microns) by the ophthalmologist (duration of the analysis: 3 minutes).

Sponsors & Collaborators

  • Fondation de France

    collaborator OTHER

  • University Hospital, Clermont-Ferrand

    lead OTHER

Principal Investigators

  • Ana MARQUES · University Hospital, Clermont-Ferrand

Study Design

Allocation
NON_RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
80 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2018-03-08
Primary Completion
2019-09-30
Completion
2020-03-30

Countries

  • France

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03454269 on ClinicalTrials.gov