Chronic dry eye symptoms after LASIK: parallels and lessons to be learned from other persistent post-operative pain disorders.

Mol Pain · 2015 · PMC4411662 · PMID 25896684

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may be significantno p-value reported

[ 4 , 5 ] These symptoms, regarded as components of dry eye, range in severity, but the effects on quality of life may be significant.

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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.