Fig 4 -

Representative TF images of the tears collected from four subjects with a high BMI before (a, c, e, and g) and after (b, d, f, and h) wearing a surgical face mask.</p

Side-by-side boxplots for the SPEED scores for the subjects with a high BMI before (SPEED1) and after (SPEED2) wearing a surgical face mask.

Side-by-side boxplots for the SPEED scores for the subjects with a high BMI before (SPEED1) and after (SPEED2) wearing a surgical face mask.</p

The median (IQR) for the SPEED, PRT, and TF scores in the control group (n = 25).

The median (IQR) for the SPEED, PRT, and TF scores in the control group (n = 25).</p

Side-by-side boxplots for the TF grades for the subjects with a high BMI before (TF1) and after (TF2) wearing a surgical face mask.

Side-by-side boxplots for the TF grades for the subjects with a high BMI before (TF1) and after (TF2) wearing a surgical face mask.</p

Side-by-side boxplots for the PRT scores for the subjects with a high BMI before (PRT1) and after (PRT2) wearing a surgical face mask.

Side-by-side boxplots for the PRT scores for the subjects with a high BMI before (PRT1) and after (PRT2) wearing a surgical face mask.</p

The median (IQR) for the SPEED, PRT, and TF scores in subjects with a high BMI (n = 25).

The median (IQR) for the SPEED, PRT, and TF scores in subjects with a high BMI (n = 25).</p