A Study to Determine the Location of the Blind Spot and the Macula-disc Centre Distance on a Fundus Photograph

February 26, 2015 updated by: Turku University Hospital

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.

Study Overview

Status

Completed

Conditions

Study Type

Observational

Enrollment (Actual)

17

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Finland
      • Turku, Finland, 20521
        • Turku University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Healthy volunteers

Description

Inclusion Criteria:

  • No disease that effect the fundus photograph or visual field

Exclusion Criteria:

  • any disease that effects the fundus photograph or visual field

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Case-Only
  • Time Perspectives: Cross-Sectional

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
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)
one measurement at the start of the study

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Location of the blind spot
Time Frame: one measurement at the start of the study
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.
one measurement at the start of the study

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Turku University Hospital

Investigators

  • Study Director: Eija Vesti, professor, Turku University Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

May 1, 2013

Primary Completion (Actual)

August 1, 2014

Study Completion (Actual)

November 1, 2014

Study Registration Dates

First Submitted

April 26, 2013

First Submitted That Met QC Criteria

April 26, 2013

First Posted (Estimate)

April 30, 2013

Study Record Updates

Last Update Posted (Estimate)

February 27, 2015

Last Update Submitted That Met QC Criteria

February 26, 2015

Last Verified

May 1, 2013

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • T81/2012

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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