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Assessment of Cyclofusion Capabilities of Normal Subjects and Patients With 3D Dynamic Random-dot Stereograms

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ClinicalTrials.gov Identifier: NCT03322111
Recruitment Status : Unknown
Verified October 2017 by Prof. Dr. Veit Sturm, Cantonal Hospital of St. Gallen.
Recruitment status was:  Not yet recruiting
First Posted : October 26, 2017
Last Update Posted : October 26, 2017
Sponsor:
Information provided by (Responsible Party):
Prof. Dr. Veit Sturm, 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.

Condition or disease Intervention/treatment Phase
Cyclofusion Competence Diagnostic Test: measurement of the cyclofusion Not Applicable

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 50 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Assessment of Cyclofusion Capabilities of Normal Subjects and Patients With 3D Dynamic Random-dot Stereograms
Estimated Study Start Date : January 2018
Estimated Primary Completion Date : April 20, 2019
Estimated Study Completion Date : April 20, 2019

Arm Intervention/treatment
Experimental: Cyclofusion Diagnostic Test: measurement of the cyclofusion
Measurement of the maximal cyclofusion competence with a dynamic 3-D Random-Dot Landolt-C stimulus




Primary Outcome Measures :
  1. 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. [ Time Frame: 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.



Information from the National Library of Medicine

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Ages Eligible for Study:   12 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Visual acuity >0,4; Stereopsis

Exclusion Criteria:

  • Visual acuity <0,4; no Stereopsis
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Responsible Party: Prof. Dr. Veit Sturm, Prof. Dr., Cantonal Hospital of St. Gallen
ClinicalTrials.gov Identifier: NCT03322111    
Other Study ID Numbers: 2016-02118
First Posted: October 26, 2017    Key Record Dates
Last Update Posted: October 26, 2017
Last Verified: October 2017

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No