- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01579331
Reliability of Dynamic Contour Tonometry (DCT) (DCT)
Study of Test-retest Reliability of Dynamic Contour Tonometry and Its Correlation With Goldmann Applanation Tonometry
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Healthy volunteers recruited among subjects who underwent a routine ophthalmologic evaluation or among students and workers both at our clinic, will undergo a series of 5 DCT to evaluate eventual differences among the measurements.
A diurnal IOP curve performed though GAT, composed of 3 measurements (9am, noon, 4pm) will be taken 1 to 7 days before the DCT.
At the end of the DCT measurements a last GAT will be taken to control eventual IOP changes versus previous GAT values obtained through the diurnal curve.
After 3 weeks observers will contact patients to record eventual adverse events. If examiners consider it as necessary, a safety ophthalmological evaluation will then be performed.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
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Catanzaro, Italy, 88100
- University of Catanzaro - Eye Department
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- healthy subjects giving a valid consent to be included in this experimentation
- age between 18 and 80 years
- best corrected visual acuity (BCVA) of at least 20/100
- refraction ranging from -6 to +6 dioptres, with an astigmatism ranging from -2 to +2 dioptres
Exclusion Criteria:
- History of refractive surgery or any keratoplasty procedure.
- Corneal opacities or diseases making no suitable applanation tonometry.
- Use of contact lenses. History of glaucoma or ocular hypertension.
- History of diabetic retinopathy staged as severe non-proliferative or worse.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
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Experimental: Dynamic Contour Tonometry
All recruited volunteers in present study, that underwent diurnal GAT tonometry (3 measures) and 5 DCT measurements.
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Healthy volunteers recruited among subject that underwent a routine ophthalmologic evaluation or among both students and workers at our clinic, will undergo a series of 5 Dynamic contour tonometries to evaluate eventual differences among measurements. Patients will be controlled for 30 days. A diurnal IOP curve performed though GAT, composed of 3 measurements (9am, noon, 4pm) will be taken 1 to 7 days before the DCT. At the end of the DCT measurements a last GAT will be taken to control eventual IOP changes versus previous GAT values obtained through the diurnal curve.
Other Names:
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
IOP expressed in mmHg
Time Frame: measurements will be taken in a single day, in approximately 30 minutes.
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5 consecutive valid DCT measurements will be taken.
After test-retest reliability of these DCT measurements will then be calculated (difference expressed in mmHg between 1st and 5th DCT measurements of IOP.
Coefficient of Variation will also be calculated).
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measurements will be taken in a single day, in approximately 30 minutes.
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OPA expressed in mmHg
Time Frame: measurements will be taken in a single day, in approximately 30 minutes.
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5 consecutive valid DCT measurements will be taken.
After test-retest reliability of these DCT measurements will then be calculated (difference expressed in mmHg between 1st and 5th DCT measurements of OPA.
Coefficient of Variation will also be calculated).
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measurements will be taken in a single day, in approximately 30 minutes.
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
IOP difference (expressed in mmHG) between first GAT and DCT
Time Frame: partecipants will undergo a GAT diurnal tonometric curve (one day duration) and after one to seven days will undergo 5 DCT (approx. duration 30 minutes)
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The diurnal tonometric curve (i.e. IOP at 9am, noon, 4pm) will be measured using GAT. After 1 to 7 days, 5 different IOP measurements recorded every 2 minutes (+/- 1) will be measured at 9am (+/- 15 minutes) using DCT. The difference between GAT and DCT values will be calculated. |
partecipants will undergo a GAT diurnal tonometric curve (one day duration) and after one to seven days will undergo 5 DCT (approx. duration 30 minutes)
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IOP difference (expressed in mmHG) between DCT and last GAT
Time Frame: partecipants will undergo 5 DCT and after these, to a single GAT measurement(approx. duration 30 minutes)
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5 different IOP measurements recorded every 2 minutes (+/- 1) will be measured at 9am (+/- 15 minutes) using DCT.
After 1-2 minutes a single GAT measurement will be recorded.
The difference between GAT and DCT values will be calculated.
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partecipants will undergo 5 DCT and after these, to a single GAT measurement(approx. duration 30 minutes)
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Luigi Varano, M. D., University of Catanzaro
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
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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