Effects of black current anthocyanoside intake on dark adaptation and VDT work-induced transient refractive alteration in healthy humans - PubMed (original) (raw)
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- PMID: 11134978
Clinical Trial
Effects of black current anthocyanoside intake on dark adaptation and VDT work-induced transient refractive alteration in healthy humans
H Nakaishi et al. Altern Med Rev. 2000 Dec.
Erratum in
- Altern Med Rev 2001 Feb;6(1):60
Abstract
The effects of oral intake of a black currant anthocyanosides (BCA) concentrate on dark adaptation, video display terminal (VDT) work-induced transient refractive alteration, and subjective asthenopia symptoms (visual fatigue) were examined in a double-blind, placebo-controlled, crossover study with healthy human subjects. In a dark adaptation study, intake of BCA at three dose levels (12.5-, 20-, and 50 mg/subject, n = 12) appeared to bring about dose-dependent lowering of the dark adaptation threshold. Statistical analysis comparing the values before and after intake indicated there was a significant difference at the 50 mg dose (p= 0. 011). Comparing the refraction values for the dominant eye, BCA intake (50 mg/subject, n = 21) resulted in no decrease in the average value after the visual task; whereas, a placebo trial resulted in a large decrease in the average value, resulting in borderline significance (p = 0.064). In the assessment of subjective asthenopia symptoms by questionnaire, significant improvement was recognized on the basis of the statements regarding the eye and lower back after BCA intake.
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