Cyclofusion Competence
Conditions
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.
Interventions
DIAGNOSTIC_TESTmeasurement of the cyclofusion
Measurement of the maximal cyclofusion competence with a dynamic 3-D Random-Dot Landolt-C stimulus
Sponsors
Cantonal Hospital of St. Gallen
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
DIAGNOSTIC
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
12 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* Visual acuity \>0,4; Stereopsis
Exclusion criteria
* Visual acuity \<0,4; no Stereopsis
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
Outcome results
None listed