Clinical Effect of Antioxidant Glasses Containing Extracts of Medicinal Plants in Patients with Dry Eye Disease: A Multi-Center, Prospective, Randomized, Double-Blind, Placebo-Controlled Trial.

PLoS One · 2015 · PMC4601690 · PMID 26457673

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a positive trendno p-value reported

In conclusion, wearing antioxidant glasses containing extracts of medicinal plants improve dry eye symptoms as well as clinical parameters of DED as indicated by a positive trend in primary and secondary outcome measures.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.