Effects of bilberry extract-containing dietary supplement on eye fatigue in VDT workers : double-blind, randomized, placebo controlled trial
- Conditions
- Eye fatigue, dry eye
- Registration Number
- JPRN-UMIN000008766
- Lead Sponsor
- ShinYokohama shinoharaguchi orthopedic surgery/ dermatology, Medical Corporation Jico-kai Yagi Hospital
- Brief Summary
Not available
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- Complete: follow-up complete
- Sex
- All
- Target Recruitment
- 80
Not provided
1) Corrected visual acuity < 1.0 2) High myopia 3) Routine use of bilberry extract, -enriched food or medicines with visual function-improving activity 4) Ophthalmic disorder and/or a history of severe ophthalmic disorder 5) Strabismus 6) Previous visual dysfunction due to cataract (congenital, senile, diabetic, complicated or traumatic) or glaucoma (chronic, acute, congenital, secondary) 7) A risk for developing pollinosis between July and December 8) Under medical treatment, or a history serious disease needing medical treatment 9) Lasik operation undergone within 3 month 10) Allergy to study diet 11) Participation in other clinical trial within a month 12) Expecting a pregnancy or lactation during the study period 13) Judged as unsuitable for the study based on the results of questionnaire 14) Judged to be excluded from the study by the investigator
Study & Design
- Study Type
- Interventional
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Critical flicker frequency, near point distance (amplitude of accommodation)
- Secondary Outcome Measures
Name Time Method Contrast sensitivity, functional visual acuity, BUT, keratconjunctival disorder, amount of lacrimal fluid storage (strip meniscometry), questionnaire