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

Vision Disparity Clinical Trial

Official 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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02735278
• Other study ID #: T426-0034-2
• Status: Completed
• Phase: N/A
• First received: March 23, 2016
• Last updated: January 11, 2017
• Start date: May 2016
• Est. completion date: January 2017

Study information

• Verified date: January 2017
• Source: University of Applied Sciences and Arts Northwestern Switzerland
• Contact: n/a
• Is FDA regulated: No
• Health authority: Switzerland: Ethikkommission
• Study type: Observational

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 24
• Est. completion date: January 2017
• Est. primary completion date: January 2017
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 17 Years to 40 Years

Eligibility

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

Observational Model: Cohort, Time Perspective: Cross-Sectional

Related Conditions & MeSH terms

• Vision Disparity

Intervention

Other:
• different test paradigms

Locations

Country	Name	City	State
n/a

Sponsors (1)

Lead Sponsor	Collaborator
University of Applied Sciences and Arts Northwestern Switzerland

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	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	No