Are There Different Objective Fixation Disparity Values for Two Different Test Paradigms

January 11, 2017 updated by: Remo Poffa, University of Applied Sciences and Arts Northwestern Switzerland

Are There Different Objective Fixation Disparity Values for Two Different Test Paradigms: Similar to Reading Dot Presentation and Text Reading? - How This Phenomenon Can be Explained

In optometry, binocular coordination is measured subjectively. The result is subjective fixation disparity. In research different experiments have proven, that subjective and objective fixation disparity are different. A binocular eyetracker has to be calibrated. There are two well known calibration methods: associated and dissociated calibration. Objective fixation disparity is measured in arcMin. Therefore, the precision of the eyetracker plays a crucial role. Now, the investigators try to compare dissociated calibration with polarized filters and associated calibration under different test paradigms.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

24

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

17 years to 40 years (ADULT, CHILD)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Adults without binocular problems

Description

Inclusion Criteria:

  • VA without glasses/contact lenses 0.63
  • Accurate accommodation on 57cm

Exclusion Criteria:

  • Tiredness at day of investigation
  • Presbyopia
  • Alcohol or drug abuse
  • No eye related pathology
  • No strabism
  • No known epilepsy-attack in family

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Fixation disparity in arcMin during a reading and reading related dot paradigm
Time Frame: Through study completion, up to 10 months
With an eyetracker fixation disparity will be measured on an objective way. The scale will be arcMin and test paradigm a reading tast and a dot task, similar to reading.
Through study completion, up to 10 months

Collaborators and Investigators

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

Sponsor

University of Applied Sciences and Arts Northwestern Switzerland

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, 2016

Primary Completion (ACTUAL)

January 1, 2017

Study Completion (ACTUAL)

January 1, 2017

Study Registration Dates

First Submitted

March 23, 2016

First Submitted That Met QC Criteria

April 6, 2016

First Posted (ESTIMATE)

April 12, 2016

Study Record Updates

Last Update Posted (ESTIMATE)

January 12, 2017

Last Update Submitted That Met QC Criteria

January 11, 2017

Last Verified

January 1, 2017

More Information

Terms related to this study

Other Study ID Numbers

  • T426-0034-2

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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