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. 2019 Jul 3;11:65–71. doi: 10.2147/OPTO.S214597

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© 2019 Alanazi et al.

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Box plots for the tear ferning grades for non-stimulated and stimulated tears.

Note: TF patterns were graded using 0.1 increments.

Abbreviations: TF, tear ferning; NTF (OD), tear ferning for non-stimulated tears collected from the right eye; NTF (OS), tear ferning for non-stimulated tears collected from the left eye; STF (OD), tear ferning for stimulated tears collected from the right eye; STF (OS), tear ferning for stimulated tears collected from the left eye.