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

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: Vision Disparity
• Intervention / Treatment: Other: different test paradigms

• Study Type: Observational
• Enrollment (Actual): 24

Participation Criteria

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

How is the study designed?

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	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

• Sponsor: University of Applied Sciences and Arts Northwestern Switzerland

Study record dates

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