- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02313259
The Impact of Ocular Diseases on Driving: a Prospective Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
This observational study has two goals:
- to establish if patients affected by dry AMD have a different speed discriminating threshold using peripheral vision fields than their healthy counterparts.
- to determine if the driving skills of AMD and glaucoma patients differ from healthy controls.
Two tasks will be used: 1) A speed discrimination test. (Glaucoma patient are not asked to perform this task as it assesses the peripheral visual fields, which is affected by the disease.) 2) A driving simulation session. Participant will undergo both tests on the same day, no later than a month after the initial recruitement visit.
For both diseases, patients will be compared to healthy controls matched for age and gender, but also to a younger control group. The latter group was added in order to take into account the normal aging impact on driving skills (visual and cognitive).
Our hypothesis is that AMD patient will show a better speed discriminating threshold than matched control and maybe better or equal to the younger control groups. We also hypothesize that driving skills involving peripheric speed awareness, such as passing another car, will be enhanced in the AMD group when compared to glaucoma patients and age-matched control group.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
Quebec
-
Québec, Quebec, Canada, G1S 4L8
- Centre universitaire d'ophtalmologie, Hôpital du Saint-Sacrement, CHU de Québec
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Patients (with glaucoma or AMD) were recruited from the Centre Universitaire d'Ophtalmologie (CUO), Saint-Sacrement Hospital in Quebec City.
Participants in control groups are residents of Quebec City.
Description
Inclusion Criteria:
- Best-corrected visual acuity (BCVA) had to be at least 20/50 (6/15).
- Binocular visual field (VF) should not be less than 120° along the horizontal meridian and 20° above and below the same meridian.
- Valid driving license
- Diagnosis of bilateral dry AMD (AMD group) or open-angle glaucoma (glaucoma group)
Exclusion Criteria:
- Diplopia
- Cognitive impairment
- Other ocular diseases
Study Plan
How is the study designed?
Design Details
- Observational Models: Other
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
AMD controls
15 patients with early to intermediate AMD (grade 2-8) were enrolled using the Age-Related Eye Disease Study (AREDS) severity scale for AMD.
|
The participant has to stare in the middle of two screens, i.e the reference screen and the test screen. Dots are moving from the center to the edge of the screens at different speeds. The participant is forced to determine if the dots of the test screen are moving faster or slower than the reference screen. The test is designed in Psychtoolbox3. Data analyses performed using MATLAB. Two-alternative forced choice paradigm. 25 km simulated car driving session. The participant is seated in the driver compartment of a real car featuring all the actual components (steering wheel, pedals regulating speed and brakes). He is instructed to respect road regulations as well as safety rules and must perform some driving manoeuvres, such has turning at intersections, stopping when necessary, passing another car, etc. Software Drive 3.0 by Systems Technology Inc., Hawthorne, California, USA. Magnetic head tracker (Flock of Birds, Ascension Technology Corporation, Burlington, Vermont, USA). A fixed-base driving simulator. 2 driving scenarios: a practice (10 minutes) and a main scenario including rural and urban sections (35 minutes). |
Age-matched controls
15 drivers without ocular disease.
|
The participant has to stare in the middle of two screens, i.e the reference screen and the test screen. Dots are moving from the center to the edge of the screens at different speeds. The participant is forced to determine if the dots of the test screen are moving faster or slower than the reference screen. The test is designed in Psychtoolbox3. Data analyses performed using MATLAB. Two-alternative forced choice paradigm. 25 km simulated car driving session. The participant is seated in the driver compartment of a real car featuring all the actual components (steering wheel, pedals regulating speed and brakes). He is instructed to respect road regulations as well as safety rules and must perform some driving manoeuvres, such has turning at intersections, stopping when necessary, passing another car, etc. Software Drive 3.0 by Systems Technology Inc., Hawthorne, California, USA. Magnetic head tracker (Flock of Birds, Ascension Technology Corporation, Burlington, Vermont, USA). A fixed-base driving simulator. 2 driving scenarios: a practice (10 minutes) and a main scenario including rural and urban sections (35 minutes). |
Young controls
15 drivers without ocular disease.
Between 18 and 25 years old.
|
The participant has to stare in the middle of two screens, i.e the reference screen and the test screen. Dots are moving from the center to the edge of the screens at different speeds. The participant is forced to determine if the dots of the test screen are moving faster or slower than the reference screen. The test is designed in Psychtoolbox3. Data analyses performed using MATLAB. Two-alternative forced choice paradigm. 25 km simulated car driving session. The participant is seated in the driver compartment of a real car featuring all the actual components (steering wheel, pedals regulating speed and brakes). He is instructed to respect road regulations as well as safety rules and must perform some driving manoeuvres, such has turning at intersections, stopping when necessary, passing another car, etc. Software Drive 3.0 by Systems Technology Inc., Hawthorne, California, USA. Magnetic head tracker (Flock of Birds, Ascension Technology Corporation, Burlington, Vermont, USA). A fixed-base driving simulator. 2 driving scenarios: a practice (10 minutes) and a main scenario including rural and urban sections (35 minutes). |
Glaucoma patients
15 patients having a Humphrey visual field mean deviation between -10 and -12 (better eye).
|
25 km simulated car driving session. The participant is seated in the driver compartment of a real car featuring all the actual components (steering wheel, pedals regulating speed and brakes). He is instructed to respect road regulations as well as safety rules and must perform some driving manoeuvres, such has turning at intersections, stopping when necessary, passing another car, etc. Software Drive 3.0 by Systems Technology Inc., Hawthorne, California, USA. Magnetic head tracker (Flock of Birds, Ascension Technology Corporation, Burlington, Vermont, USA). A fixed-base driving simulator. 2 driving scenarios: a practice (10 minutes) and a main scenario including rural and urban sections (35 minutes). |
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Speed discrimination threshold
Time Frame: Before driving simulation
|
75% point is taken as a measure of the discrimination threshold.
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Before driving simulation
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Driving performance
Time Frame: After speed discrimination task
|
Probe reaction time task.
Speed limits.
Respect of traffic safety rules.
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After speed discrimination task
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Gilles Lalonde, MD, Centre Universitaire d'Ophtalmologie (CUO), Saint-Sacrement Hospital, Quebec City.
- Study Director: Marc Hébert, PhD, Centre Universitaire d'Ophtalmologie (CUO), Saint-Sacrement Hospital, Quebec City
Study record dates
Study Major Dates
Study Start (Actual)
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 (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2012-1593, DR-002-1370
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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