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

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.

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Key information

Conditions

Vision Disparity

Age range

17 year–40 year

Sex eligibility

All sexes

Study type

Observational

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

different test paradigms

Other

Primary outcomes

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.

Sponsors and collaborators

Lead sponsor

University of Applied Sciences and Arts Northwestern Switzerland

Other

Registry information

Official study title

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

Important dates

Study start: 2016
Primary completion: 2017
Study completion: 2017
First posted: Apr 12, 2016
Registry last updated: Jan 12, 2017

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.