eye movement disorders
Conditions
Interventions
None listed
Sponsors
Medisch Universitair Ziekenhuis Maastricht
Eligibility
Age
18 Years to 99 Years
Inclusion criteria
Inclusion criteria: *Patients (age: 40 - 80) have Parkinson*s disease, essential tremor, Dystonia or Tourette Syndrom treated with DBS. *The surgery took place at least 3 months prior to this eye movement study without complications.
Exclusion criteria
Exclusion criteria: *Patients with other disease than the above mentioned *Intraocular disease such as macular degeneration *Strabismus *Deformities of the eye bulb *Minors and incapacitated patients
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 1) saccades: a. latency: time between the onset of the target (i.e. the point of light) and the beginning of the eye movement. b. accuracy of saccadic eye movements: final eye position over the final position of the point of light 2) smooth pursuit: max. speed of the eye over the speed of the point of light at 0.2 Hz & 0.4 Hz 3) gaze-holding functioning: fixation nystagmus while looking straight ahead, left, right, up and down 4) head impulse test: max. speed of the eye over the max. speed of the head in the opposite | — |
Secondary
| Measure | Time frame |
|---|---|
| The above mentioned parameters of one subgroup will be compared with the parameters of another subgroup (i.e. Parkinson*s disease versus essential tremor, Parkinson*s disease versus dystonia) | — |
Countries
Netherlands
Outcome results
None listed