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

Completed

• Conditions: Vision Disparity

• Registration Number: NCT02735278
• Lead Sponsor: University of Applied Sciences and Arts Northwestern Switzerland

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2016-03-23
• Study First Submitted QC: 2016-04-06
• Study First Posted: 2016-04-12
• Study Start: 2016-05
• Status Verified: 2017-01
• Primary Completion: 2017-01
• Study Completion: 2017-01
• Last Update Submitted: 2017-01-11
• Last Update Posted: 2017-01-12

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 24

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 & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Fixation disparity in arcMin during a reading and reading related dot paradigm	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.