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Analysis of Visual Pathways in Glaucoma Patients Using a 3tesla-MRI (ENVOL)

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ClinicalTrials.gov Identifier: NCT01621841
Recruitment Status : Completed
First Posted : June 18, 2012
Last Update Posted : December 19, 2013
Information provided by (Responsible Party):

June 11, 2012
June 18, 2012
December 19, 2013
June 2012
June 2013   (Final data collection date for primary outcome measure)
fractional anisotropy [ Time Frame: Inclusion ]
Same as current
Complete list of historical versions of study NCT01621841 on ClinicalTrials.gov Archive Site
  • volume of retrochiasmatic grey matter [ Time Frame: Inclusion ]
  • global atrophy [ Time Frame: inclusion ]
  • hyper intensities white matter [ Time Frame: inclusion ]
Same as current
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Analysis of Visual Pathways in Glaucoma Patients Using a 3tesla-MRI
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Glaucoma is a neurodegenerative disease representing the second cause of blindness worldwide. IOP (Intra occular pressure) is the most common risk factor, but not the only one as it is observed for normal tension glaucoma. Some studies have reported lesions of the optical pathways on MRI examination MRI 3T (Magnetic Resonance Imaging 3 Telsa), by increasing spatial resolution and DTI (diffusion tensor Imaging)with fractional anisotropy could help us to analyze visual pathways and to determine the association with neurodegenerative diseases as Alzheimer.

The investigators propose to compare volume and structure of the visual pathways between glaucoma patients and healthy subjects matched on age and sex.

Glaucoma is a neurodegenerative disease characterized by loss of retinal ganglion cells, visual field deterioration and optic nerve cupping. Some studies have suggested that all the visual pathways could be damaged in glaucoma. Recently, a German study proved a significant reduction of volume of the optic radiations in glaucoma versus healthy subjects in MRI 3T. Some authors have also suggested that glaucoma could share similarities with the other neurodegenerative diseases like Alzheimer's disease. MRI 3T and DTI allow studying visual pathways with a high level of spatial resolution.Fractional anisotropy is a tag of microstructure.

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Observational Model: Case Control
Time Perspective: Prospective
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Non-Probability Sample
Glaucoma subjects are recruted in ophtalmologic departement
  • Glaucoma
  • Fractional Anisotropy
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  • Glaucoma subjects
  • heathly subjects
Tellouck L, Durieux M, Coupé P, Cougnard-Grégoire A, Tellouck J, Tourdias T, Munsch F, Garrigues A, Helmer C, Malet F, Dartigues JF, Dousset V, Delcourt C, Schweitzer C. Optic Radiations Microstructural Changes in Glaucoma and Association With Severity: A Study Using 3Tesla-Magnetic Resonance Diffusion Tensor Imaging. Invest Ophthalmol Vis Sci. 2016 Dec 1;57(15):6539-6547. doi: 10.1167/iovs.16-19838.

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
November 2013
June 2013   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • for cases : Age over 40 years-old, glaucomatous lesion of the optic nerve head with cup/disc ratio, visual field loss, and minimental state superior or equal to 28/30
  • for healthy subjects/ matched on age and sex, no individual or familial history of glaucoma, IOP less than 21mmHG, minimental state superior or equal to 28/30

Exclusion Criteria:

  • Ocular hypertension, optic nerve disease, visual field loss, diabetes, Horton disease, ocular diseases, immunologic diseases, neuropsychiatric diseases, MRI contraindication (pace maker)
Sexes Eligible for Study: All
40 Years and older   (Adult, Senior)
Contact information is only displayed when the study is recruiting subjects
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University Hospital, Bordeaux
University Hospital, Bordeaux
Union National des Aveugles et DEficients Visuels
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University Hospital, Bordeaux
December 2013