Diurnal Variability of Human Tear Volume and Production Rate: An Exploratory Study.

Modified Schirmer Strip Test Wetted Length Table 2 demonstrates an initial increase in MSST wetted length during the morning hours which did not reach statistical significance ( P values > 0.05).

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2 This differs vastly from the mechanism of reflex tearing, which is triggered by a strong stimulus that may be significant enough to cause ocular discomfort.

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