Retinal Function in Parkinson's Disease

The recruitment status of this study is unknown because the information has not been verified recently.
Verified November 2009 by Edward Hines Jr. VA Hospital.
Recruitment status was  Recruiting
Information provided by:
Edward Hines Jr. VA Hospital Identifier:
First received: November 6, 2009
Last updated: NA
Last verified: November 2009
History: No changes posted

November 6, 2009
November 6, 2009
October 2009
December 2010   (final data collection date for primary outcome measure)
pupillary threshold [ Time Frame: one ] [ Designated as safety issue: No ]
Same as current
No Changes Posted
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Retinal Function in Parkinson's Disease
Intrinsically Photosensitive Retinal Ganglion Cells in Parkinson's Disease
Parkinson's disease (PD) is a neurodegenerative disorder characterized by muscle rigidity, tremor, a slowing of physical movement (bradykinesia) and, in extreme cases, a loss of physical movement. The primary symptoms are the results of decreased stimulation of the motor cortex arising from the basal ganglia normally caused by the insufficient formation and action of dopamine, which is produced in the dopaminergic neurons of the brain. Secondary symptoms may include high level cognitive dysfunction and subtle language problems. Included in the symptomatology experienced by patients with PD, visual abnormalities are not uncommon. Visual changes among patients with PD appear not only dynamic in nature, but differentially affected based on the course of the disease and, perhaps more importantly, its treatment. Parkinson's disease has significant ramifications not only in observation of irregularities in vision, but how vision interacts with entrainment of the circadian clock. The purpose of this study is to examine the relationship between PD and operation of a unique set of retinal cells known to regulate the circadian clock and sleep-wake cycles in human subjects.
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Observational Model: Case Control
Time Perspective: Cross-Sectional
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Non-Probability Sample
movement disorders/neurology clinic
Parkinson's Disease
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
December 2010
December 2010   (final data collection date for primary outcome measure)

Inclusion Criteria: age 18-64 best corrected visual acuity of 20/25 or better in each eye -

Exclusion Criteria: evidence of any form of eye disease, inability to understand and sign informed consent.

18 Years to 64 Years
Contact: Bruce Ira Gaynes, OD, PharmD 708-216-6262
Contact: Jasvinder Chawla, MD 708-202-3800
United States
Bruce I. Gaynes, OD, PharmD, Hines VA Medical Center
VA Office of Research and Development
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Edward Hines Jr. VA Hospital
November 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP