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

University of Applied Sciences and Arts Northwestern Switzerland

Status: Completed

Conditions: Vision Disparity

Treatments: Other: different test paradigms

Study type: Observational

Funder types: Other

Identifiers

NCT02735278

T426-0034-2

Details and patient eligibility

About

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.

Enrollment: 24 patients

Sex: All

Ages: 17 to 40 years old

Volunteers: Accepts Healthy Volunteers

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