Vision Disparity
Conditions
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.
Interventions
OTHERdifferent test paradigms
Sponsors
University of Applied Sciences and Arts Northwestern Switzerland
Study design
Observational model
COHORT
Time perspective
CROSS_SECTIONAL
Eligibility
Sex/Gender
ALL
Age
17 Years to 40 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
Outcome results
None listed