DRKS00014187.

Study name	Convergence insufficiency: improvement of the near point of convergence after Institute Freespace Stereogram exercises
Methods	Study type: RCT, parallel group Location: Thun, Switzerland Number of centers: NR (multicenter) Duration of study: NR Follow‐up: 4 weeks Protocol: NR
Participants	Inclusion criteria: Gender: both, male and female Minimum age: 18 Years Maximum age: no maximum age Enlarged near point of convergence (more than 10 cm) Exclusion criteria: Strabismus, nystagmus, neurological diseases
Interventions	Treatment groups: The treatment group who will be performing the Institute Free‐Space Stereogramm exercises The placebo group who will be performing placebo training that was developed for this study
Outcomes	Primary outcome Change of the near point of convergence after visual therapy. Secondary outcomes Positive fusional vergence in cm/m Score of the Convergence Insufficiency Symptom Survey questionnaire to quantify symptomatology Mallett criteria and the Sheard's criteria in cm/m (prism diopters)
Starting date	April, 2018
Contact information	Mr. BSc optom Volkhard Schroth; +41629572605; volkhard.schroth@fhnw.ch
Notes	Funding: Institutional budget, no external funding (budget of sponsor/PI) Conflict of interest: NR