Generalized Visual Field Contraction or ConstrictionNCT01843582
A Study to Determine the Location of the Blind Spot and the Macula-disc Centre Distance on a Fundus Photograph
An observational study of Generalized Visual Field Contraction or Constriction, run by Turku University Hospital at 1 site in Finland.
Trial summary
The study is aimed to develop a new reaction-time based method for examining the visual field and to study the effect of refractive error on the magnification of a fundus photograph in order to evaluate the true size of a retinal feature. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Generalized Visual Field Contraction or Constriction
- How many people
- 17 participants
- Where
- 1 siteFinland
- Study dates
- May 2013to Nov 2014
- How long will I take part?
- 1 Day
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Study population: Healthy volunteers
Who may be able to join
- No disease that effect the fundus photograph or visual field
Who cannot join
- any disease that effects the fundus photograph or visual field
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Study to Develop Both a Novel Method for Evaluating the True Size of a Retinal Object on Fundus Photographs and a New Reaction-time Based Method for Studying the Visual Field on Healthy Volunteers
The study is aimed to develop a new reaction-time based method for examining the visual field and to study the effect of refractive error on the magnification of a fundus photograph in order to evaluate the true size of a retinal feature.
- Keywords
- Keyword: blind spot
- Medical subject headings
- Constriction, Pathologic
What is being measured
The primary outcome is the main question the study is designed to answer.
Macula-disc centre distance
Measurement is done on a fundus photograph (one visit and one examination for each patient)
Measured: one measurement at the start of the study
Secondary outcomes (1)
Location of the blind spot
The location of the blind spot is screened using Octopus custom made visual field program at the one visit (one visit and one study for each patient) and a novel reaction-time based visual field device.
Measured: one measurement at the start of the study
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Apr 2013 (estimated)
- Study startMay 2013
- Primary completionAug 2014
- Study completionNov 2014
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Generalized Visual Field Contraction or ConstrictionStudies of the same condition, open and under way.
- More trials run by Turku University HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Cross-sectional
- Enrolment
- 17 participants (actual)
- Target duration
- 1 Day
Sponsor and investigators
- Lead sponsor
- Turku University Hospital
- Sponsor type
- Other government
- Responsible party
- Sponsor
- Investigators
- Eija Vesti, professor, Study director, Turku University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01843582
- Sponsor's protocol ID
- T81/2012
- Status last verified
- May 2013
- First submitted
- 26 Apr 2013
- Last updated
- 27 Feb 2015
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 27 Feb 2015. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Study to Develop Both a Novel Method for Evaluating the True Size of a Retinal Object on Fundus Photographs and a New Reaction-time Based Method for Studying the Visual Field on Healthy Volunteers
- ClinicalTrials.gov ID
- NCT01843582
- Acronym / sponsor ID
- T81/2012
- Keywords
- Keyword: blind spot
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 17 participants (actual)
- Lead sponsor
- Turku University HospitalOther government
- Study start
- May 2013
- Primary completion
- Aug 2014 (actual)
- Study completion
- Nov 2014 (actual)
- First posted
- 30 Apr 2013 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The study is aimed to develop a new reaction-time based method for examining the visual field and to study the effect of refractive error on the magnification of a fundus photograph in order to evaluate the true size of a retinal feature.
Study design
- Observational model
- Case only
- Time perspective
- Cross-sectional
- Target follow-up
- 1 Day
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- Healthy volunteers
Key inclusion criteria (1 listed)
- No disease that effect the fundus photograph or visual field
Key exclusion criteria (1 listed)
- any disease that effects the fundus photograph or visual field
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Macula-disc centre distance
Time frame: one measurement at the start of the study
Measurement is done on a fundus photograph (one visit and one examination for each patient)
1 secondary outcome
Location of the blind spot
Time frame: one measurement at the start of the study
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 27 Feb 2015.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Eija Vesti, professor study director
Turku University Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Generalized Visual Field Contraction or Constriction, run by Turku University Hospital at 1 site in Finland.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 27 Feb 2015. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Finland. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Macula-disc centre distance (time frame: one measurement at the start of the study). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Feb 2015.