Please assess the completion status of the following clinical trial:

Trial Title: Effect of the Visual Information Change in Functional Dystonia

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~Case~* Presenting a cervical dystonia that occurs only during handwriting tasks, diagnosed by a neurologist specialised in movement disorders~* Being treated or not by injection of Botulinum Neurotoxin (but last injection \> 3 months before the initial assessment)~Control~* No cervical dystonia~* Same sex, age (± 5 years), socio-professional level and hand laterality as the cases~Exclusion Criteria:~Case~* Cervical dystonia occuring in other circumstances than handwriting~* Neurological disease other than cervical dystonia (e.g. Parkinson's syndrome)~* Pain, trauma or pathology of the cervical spine of another cause than cervical dystonia and which have required medical or surgical treatment in the last 6 months preceding the initial assessment~Control~* Cervical disorders requiring medical or surgical treatment in the last 6 months prior to the tests~* Neurological disease affecting the cervical region or the writing hand~* Uncorrected visual disorders

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 71 Years
- Healthy Volunteers: t

Study Arms:
- orthoptic treatment (Type: EXPERIMENTAL): Patients with cervical dystonia occuring only during handwriting.
- Controls (Type: NO_INTERVENTION): Patients without cervical dystonia.

Based on this trial design, predict the completion outcome and termination type (if applicable).