In-school eyecare in special education settings has measurable benefits for children's vision and behaviour.

PLoS One · 2019 · PMC6675062 · PMID 31369627

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failed to reach significanceno p-value reported

While there was also evidence for improvements in other observed behaviours at follow-up, the improvements failed to reach significance.

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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.