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About
This proof of concept clinical study will investigate the efficacy of active lens with frame in alleviating the symptoms of migraine which are caused by photosensitivity.
The spectacles cut out blue light wavelength and hypothetically alleviate symptoms of migraine and thus either treat or prevent migraine headaches from occurring.
Full description
Patients will be randomised to one of two groups:
Group 1
Patients wear sham glasses for 4 weeks
Patients have 1 week's washout
Patients wear active glasses for 4 weeks
Group 2
Patients wear active glasses for 4 weeks
Patients have 1 week's washout
Patients wear sham glasses for 4 weeks
The study will aim to determine whether wearing the active lens successfully reduces the symptoms of migraine, compared to wearing sham lens.
Assuming a fairly conservative SD in the primary endpoint of 8 points, a total of 56 participants would be required to have 90% power to detect a minimum clinically significant difference of 5 points in a two-sample t-test. Allowing for a 20% drop-out rate, 70 participants would need to be recruited.
Patients will be in the trial for a total of 13 weeks (4 week run-in, two 4 week periods, with 1 week washout in between).
Enrollment
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Inclusion criteria
Over 18 years old
Diagnosis of migraine before the age of 50, confirmed though screening consultation with the patient
Willing and able to provide written informed consent
Willing to comply with study assessment schedule and patient diary entry
Diagnosis of migraine, with or without aura based on the following primary headache characteristics (based on the Revised International Headache Society criteria for migraine headache)
i. unilateral location ii. pulsating quality iii. moderate or severe pain intensity iv. aggravation by or causing avoidance of routine physical activity (e.g., walking or climbing stairs) d. During headache at least one of the following: i. nausea and/or vomiting ii. photophobia and phonophobia e. Not attributed to another disorder
Migraine associated with photophobia i.e. either photic hypersensitivity or photic allodynia or inter-ictal photophobia or migraine triggered by light according to patient or a combination of these 4 factors
No expected changes of headache preventative medications after enrolment
Exclusion criteria
Primary purpose
Allocation
Interventional model
Masking
77 participants in 2 patient groups
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Central trial contact
Yoshito Takeuchi; Hironori Kuboi
Data sourced from clinicaltrials.gov
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