G24.5
Conditions
Interventions
Group 1: photo-protective and photo-selective blue-filtering ophthalmic lenses for two weeks
Group 2: Placebo ophthalmic lenses for two weeks
Sponsors
Medizinische Universität Wien
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: idiopathic benign essential blepharospasm
Exclusion criteria
Exclusion criteria: any other disease with involuntary blinking (Hemifacial spasm, Tic disorder, Tardive dyskinesia, etc.); in case of ongoing BoNT therapy < 12 weeks since last BoNT injection, acute or chronic severe medical conditions which would preclude the subject from participating; a medical history of dementia or seizure disorder; pregnancy; less than 18 years old; unable or unwilling to give informed consent/ to cooperate with study requirements.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Change in blink frequency - Comparison of baseline to 2 weeks after verum glasses and 2 weeks after placebo glasses | — |
Secondary
| Measure | Time frame |
|---|---|
| blink frequency under different conditions: Resting condition (looking straight ahead) – 3 minutes Reading a standardized text – 3 minutes Playing a monitor interactive game – 3 minutes 3 different photopic conditions (99%, 64%, 33% contrast) - each 6 minutes | — |
Countries
Austria
Contacts
Public ContactThomas Sycha
Medizinische Universität Wien
Outcome results
None listed