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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/ct2/show/NCT00328835
Registration number
NCT00328835
Ethics application status
Date submitted
18/05/2006
Date registered
22/05/2006
Date last updated
17/10/2006
Titles & IDs
Public title
Optic Nerve Compliance Study
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Scientific title
Optic Nerve Compliance Study
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Secondary ID [1]
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ONCS
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Glaucoma
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Condition category
Condition code
Eye
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Diseases / disorders of the eye
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Surgery - Brief Elevation of IOP
Treatment: Surgery: Brief Elevation of IOP
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Intervention code [1]
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Treatment: Surgery
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Optic Disc Change
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Assessment method [1]
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Timepoint [1]
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Primary outcome [2]
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Visual Field Progression
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Assessment method [2]
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Timepoint [2]
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Secondary outcome [1]
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Visual Acuity Change
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Assessment method [1]
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Timepoint [1]
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Eligibility
Key inclusion criteria
- Age over 18, Diagnosis of glaucoma (visual field proven), Stable, well controlled
glaucoma
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
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Key exclusion criteria
- Previous eye surgery, Best corrected visual acuity <6/9, Chronic eye disease
(including glaucoma, Secondary glaucoma (eg uveitis, neovascular glaucoma, etc),
Advanced or fixation-threatening visual field changes, Ocular perfusion abnormalities
(e.g. previous retinal artery or vein occlusion; or abnormal vasculature including
those whose retinal circulation might be compromised by pressure on the eye).
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Study design
Purpose of the study
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Allocation to intervention
Non-randomised trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Single group
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/03/2006
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
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Recruitment outside Australia
Country [1]
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New Zealand
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State/province [1]
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Wellington
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Funding & Sponsors
Primary sponsor type
Other
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Name
Capital Vision Research Trust
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
Chronic glaucoma is one of the leading causes of blindness and visual loss in the developed
world. It is a condition where long term exposure to high eye pressures (intra-ocular
pressure) damages the nerve fibres in the eye. This damage can be seen by examiners as
changes in the optic nerve. The exact mechanism of how the high intra-ocular pressure causes
nerve damage is unknown. Both physiological and mechanical mechanisms are thought to play a
role. Previous authors have reported structural changes in the connective tissue of optic
nerves of eyes with glaucoma. Structural changes in the optic nerve head which affect the
mechanical compliance of the nerve may be significant in the cause of glaucomatous nerve
damage. This study aims to assess the compliance of the optic disc in subjects with and
without glaucoma. We would test compliance by imaging the optic discs of participants before
and during a brief (less than two minutes) increase in intra-ocular pressure. We would aim to
repeat the tests on the same subjects 3 years later to see how compliance changed. We would
also seek to correlate other important parameters such as corneal thickness and visual field
changes with our findings
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Trial website
https://clinicaltrials.gov/ct2/show/NCT00328835
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Anthony P Wells, FRANZCO
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Address
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CVRT, Wellington School Of Medicine - University of Otago
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Country
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Phone
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Fax
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Email
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Contact person for public queries
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Address
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Country
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Phone
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Fax
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Email
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Contact person for scientific queries
Summary Results
For IPD and results data, please see
https://clinicaltrials.gov/ct2/show/NCT00328835
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