Assessment of Cyclofusion Capabilities of Normal Subjects and Patients With 3D Dynamic Random-dot Stereograms
- Conditions
- Cyclofusion Competence
- Interventions
- Diagnostic Test: measurement of the cyclofusion
- Registration Number
- NCT03322111
- Lead Sponsor
- Cantonal Hospital of St. Gallen
- Brief Summary
With this study the investigator wants measure the individual cyclofusion competence from healthy subjects and patients suffering from Strabismus with a only binocularly visible threedimensional Landolt-C stimulus. For this the participant has to look at a 3-D monitor with shutter glasses. The participant is sitting in 2 meter distance in front of the monitor. On the monitor appears the Landolt-C stimulus as a dynamic Random-Dot Stimulus. As long as the participant can fuse the stimulus he will be able to see the Landolt C-ring threedimensional. The participant is then ask to tell in which direction the notch of the Landolt-C ring points out. Once a critical degree of cyclotorsion is reached the participant will no longer be able to see the Landolt C ring and the individual cyclofusion competence is reached.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 50
- Visual acuity >0,4; Stereopsis
- Visual acuity <0,4; no Stereopsis
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Cyclofusion measurement of the cyclofusion -
- Primary Outcome Measures
Name Time Method In- and excyclofusion competence in healthy individuals. Change in In- and excyclofusion competence in patients who need a strabismus surgery before and 6 month after surgery. Once in healthy individuals. Before and 6 month after a (independent from the study) performed strabismus surgery. The maximum in- and maximum excyclofusion competence will be measured with the described test set-up. The results will be documented in degree.
- Secondary Outcome Measures
Name Time Method