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Tear ferning grades
| TF grade* | Median (IQR) | |
|---|---|---|
| Non-stimulated tears | Stimulated tears | |
| TF (OD) | 0.55 (0.89) | 0.65 (0.99) |
| TF (OS) | 0.50 (1.11) | 0.70 (1.15) |
Notes: *P>0.05. TF patterns were graded using 0.1 increments.
Abbreviations: IQR, interquartile range; TF, tear ferning; OD, right eye; OS, left eye.
