NCT02735278

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.

Trial Health

100
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
24

participants targeted

Target at below P25 for all trials

Timeline
Completed

Started May 2016

Shorter than P25 for all trials

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

March 23, 2016

Completed
20 days until next milestone

First Posted

Study publicly available on registry

April 12, 2016

Completed
19 days until next milestone

Study Start

First participant enrolled

May 1, 2016

Completed
8 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

January 1, 2017

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

January 1, 2017

Completed
Last Updated

January 12, 2017

Status Verified

January 1, 2017

Enrollment Period

8 months

First QC Date

March 23, 2016

Last Update Submit

January 11, 2017

Conditions

Vision Disparity

Outcome Measures

Primary Outcomes (1)

  • 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

Interventions

different test paradigmsOTHER

Eligibility Criteria

Age17 Years - 40 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)
Sampling MethodNon-Probability Sample
Study Population

Adults without binocular problems

You may qualify if:

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

You may not qualify if:

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

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
CROSS SECTIONAL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
M.Sc Vision Science (Optometry)

Study Record Dates

First Submitted

March 23, 2016

First Posted

April 12, 2016

Study Start

May 1, 2016

Primary Completion

January 1, 2017

Study Completion

January 1, 2017

Last Updated

January 12, 2017

Record last verified: 2017-01

Data Sharing

IPD Sharing
Will not share