- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03743467
Study on the Visual Condition in Parkinson's Disease
Study Regarding the Realization of a Standardized Protocol for the Evaluation of the Visual Condition in Parkinson's Disease
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
In Parkinson's disease (PD) several non-motor signs and symptoms already occur in the early stages of the disease; the symptoms are diverse and these also involve visual difficulties which commonly affect the majority of patients and which gradually worsen the quality of life.
The most common malfunction produced by PD is the dysfunction of dopaminergic pathways that may be responsible for a series of visual deficits too:
- decreased visual acuity and decreased sensibility to light and color,
- strabismus and forms of sensory and eye movement dysfunctions,
- eyelid dysfunctions and dry eye syndrome
Moreover, in patients affected by PD, typical retinal features were discovered for the first time in 2004 by the use of OCT (Optical Coherence Tomography) such as:
- the reduction of the retinal nerve fiber layer (RNFL)
- a typical thinning of the macular thickness, even if with different results. In the follow-up of the PD, these retinal features, verifiable by the use of OCT, could be considered as a marker of the pathology.
For these reasons it may be useful:
- quantify in an objective manner how much the visual aspects affect the overall deterioration of the quality of life in patients with PD
- demonstrate the validity of a specific and integrated outpatient diagnostic protocol for the study of visual and ophthalmological disorders in patients with PD
- demonstrate the diagnostic role of early changes in macular thickness and of the optic disc in subjects suffering from PD using the OCT
- establish orthoptic evidence in patients with PD
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Contact
- Name: Nicola Modugno, MD, PhD
- Phone Number: 00390865929250
- Email: nicusmod@gmail.com
Study Contact Backup
- Name: Michele Meglio, BSc, M.Sc
- Phone Number: 00393332069181
- Email: michele.meglio@neuromed.it
Study Locations
-
-
Isernia
-
Pozzilli, Isernia, Italy, 86077
- Recruiting
- Neuromed IRCCS
-
Contact:
- Michele Meglio, BSc, M.Sc
- Phone Number: 00393332069181
- Email: michele.meglio@neuromed.it
-
Contact:
- Modugno Nicola, MD, PhD
- Phone Number: 00390865929250
- Email: nicusmod@gmail.com
-
Pozzilli, Isernia, Italy, 86170
- Recruiting
- IRCCS Neuromed
-
Contact:
- Nicola Modugno, MD, PhD
- Phone Number: +393922571585
- Email: nicusmod@gmail.com
-
Contact:
- Michele Meglio, BSc,M.sc
- Phone Number: 00393332069181
- Email: michele.meglio@neuromed.it
-
Principal Investigator:
- Nicola Modugno, MD, PhD
-
Sub-Investigator:
- Michele Meglio, BSc,M.sc
-
Sub-Investigator:
- Enrica Olivola, MD
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
- Patients affected by Parkinson's disease (PD) according to the diagnostic criteria of the United Kingdom Brain Bank, in the ON phase of their usual treatment (Hoehn-Yahr Stage from 1 to 3) coming from Parkinson's Center of Neuromed IRCCS Institute with signature of the Informed Consent and of the privacy form.
- Health subjects coming from Neurological Department of Neuromed IRCCS Institute with signature of the Informed Consent and of the privacy form.
Description
Inclusion Criteria:
- Patients aged ≥ 18 years
- Patients affected by Parkinson's disease (PD) according to the diagnostic criteria of the United Kingdom Brain Bank, in the ON phase of their usual treatment
- Hoehn-Yahr Stage from 1 to 3
- Signature of the Informed Consent and of the privacy form
Exclusion Criteria:
- Patients with symptoms and signs compatible with atypical parkinsonism
- PD patients treated with antagonist drugs for central dopaminergic receptors (first and second generation antipsychotics) in the last 6 months before enrollment
- Patients suffering from other neurological diseases
- Patients with evident cognitive impairment (MMSE <24/30)
- Patients with manifest eye movement disorders prior to the diagnosis of PD.
- Patients with daltonism
- Patients with amblyopia
- Patients suffering from high anisometropia
- Patients suffering from advanced cataracts
- Patients suffering from glaucoma
- Patients suffering from maculopathy
- Patients suffering from pathologies of the optic nerve
- Patients with severe visual field deficits
- Patients with refractive defects above 5 diopters
Study Plan
How is the study designed?
Design Details
- Observational Models: Case-Control
- Time Perspectives: Other
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Control group
Health subjects
|
|
PD patients Hoehn Yahr 1
Patients with Hoehn Yahr stage 1
|
|
PD patients Hoehn Yahr 2-3
Patients with Hoehn Yahr stage 2 and 3
|
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Check the impact of visual condition on the quality of life in patients with PD through the use of questionnaires.
Time Frame: through study completion with an avarage of 6 months
|
Quantify the impact of visual condition using the VFQ-25 (Visual Functional Questionnaire) in patients with PD through the main method of this questionnaire: all items are scored, each item is then converted to a 0 to 100 scale so that the lowest and highest possible scores are set at 0 and 100 points, respectively so that scores represent the achieved percentage of the total possible score, e.g. a score of 50 represents 50% of the highest possible score. The lowest percentage is the better outcome for the visual condition. |
through study completion with an avarage of 6 months
|
Survey the validity of a specific diagnostic protocol for the evaluation of the visual condition in patients with PD.
Time Frame: through study completion with an avarage of 6 months
|
Review the validity of a specific and integrated ambulatory diagnostic protocol for the study of visual and ophthalmological disorders through a visit protocol and exams designed specifically for patients with PD based on the evidence of visual conditions in the disease currently present in the scientific literature trough the best corrected visual acuity expressed in twentieths and the use of the SLOAN chart.
|
through study completion with an avarage of 6 months
|
Survey the validity of a specific diagnostic protocol for the evaluation of the visual condition in patients with PD.
Time Frame: through study completion with an avarage of 6 months
|
Review the validity of a specific and integrated ambulatory diagnostic protocol for the study of visual and ophthalmological disorders through a visit protocol and exams designed specifically for patients with PD based on the evidence of visual conditions in the disease currently present in the scientific literature trough the quantification of contrast sensitivity expressed by the CSC (contrast sensitivity curve) trough the use of the Contrast Sensitivity Chart 6 lines.
|
through study completion with an avarage of 6 months
|
Survey the validity of a specific diagnostic protocol for the evaluation of the visual condition in patients with PD.
Time Frame: through study completion with an avarage of 6 months
|
Review the validity of a specific and integrated ambulatory diagnostic protocol for the study of visual and ophthalmological disorders through a visit protocol and exams designed specifically for patients with PD based on the evidence of visual conditions in the disease currently present in the scientific literature trough the color sensitivity examination with the administration of the Ishihara test (38 plates) and results expressed by the Ishihara algorithm.
|
through study completion with an avarage of 6 months
|
Survey the validity of a specific diagnostic protocol for the evaluation of the visual condition in patients with PD.
Time Frame: through study completion with an avarage of 6 months
|
Review the validity of a specific and integrated ambulatory diagnostic protocol for the study of visual and ophthalmological disorders through a visit protocol and exams designed specifically for patients with PD based on the evidence of visual conditions in the disease currently present in the scientific literature trough the Shirmer test with results expressed in millimeters.
|
through study completion with an avarage of 6 months
|
Survey the validity of a specific diagnostic protocol for the evaluation of the visual condition in patients with PD.
Time Frame: through study completion with an avarage of 6 months
|
Review the validity of a specific and integrated ambulatory diagnostic protocol for the study of visual and ophthalmological disorders through a visit protocol and exams designed specifically for patients with PD based on the evidence of visual conditions in the disease currently present in the scientific literature trough the break up time test with results expressed in seconds of tear break.
|
through study completion with an avarage of 6 months
|
Survey the validity of a specific diagnostic protocol for the evaluation of the visual condition in patients with PD.
Time Frame: through study completion with an avarage of 6 months
|
Review the validity of a specific and integrated ambulatory diagnostic protocol for the study of visual and ophthalmological disorders through a visit protocol and exams designed specifically for patients with PD based on the evidence of visual conditions in the disease currently present in the scientific literature trough the measurement of ocular pressure expressed in mmHg by the use of a Non- Contact Tonometry.
|
through study completion with an avarage of 6 months
|
Inspection of orthoptic condition in patients with PD
Time Frame: through study completion with an avarage of 6 months
|
Analysis of orthoptic features in patients with PD trough eye movements examination to determine hypofunctions/ hyperfunctions in ductions and versions.
|
through study completion with an avarage of 6 months
|
Inspection of orthoptic condition in patients with PD
Time Frame: through study completion with an avarage of 6 months
|
Analysis of orthoptic features in patients with PD trough the quantification of convergence by the calculation of the near point of convergence expressed in millimeters.
|
through study completion with an avarage of 6 months
|
Inspection of orthoptic condition in patients with PD
Time Frame: through study completion with an avarage of 6 months
|
Analysis of orthoptic features in patients with PD trough the quantification of stereopsis expressed in seconds of arc trough the use of Lang stereo test and TNO stereo test.
|
through study completion with an avarage of 6 months
|
Inspection of orthoptic condition in patients with PD
Time Frame: through study completion with an avarage of 6 months
|
Analysis of orthoptic features in patients with PD by checking the presence of latent or manifest squint trough Cover and Uncover test in 9 position of gaze.
|
through study completion with an avarage of 6 months
|
Inspection of orthoptic condition in patients with PD
Time Frame: through study completion with an avarage of 6 months
|
Analysis of orthoptic features in patients with PD trough the quantification of the fusional amplitude expressed in prismatic diopters at distance (6 meters) and near (40 cm).
|
through study completion with an avarage of 6 months
|
Observation of retinal features in patients with PD through the use of OCT
Time Frame: through study completion with an avarage of 6 months
|
Registration of the retinal features in patients with PD using OCT trough a quantitative analysis of the macular area and of the optical disc by the registration of retinal tickness expressed in microns for RPE, RNFL and Neuroretine Layer.
|
through study completion with an avarage of 6 months
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Modugno Nicola, MD, PHD, Neuromed IRCCS
Study record dates
Study Major Dates
Study Start (Anticipated)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- NMOD_01
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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