Fig. 8

The thinning rate of the PCTF around the central region of cornea. The time scale started at 2.5 s after the blink, the OCT scanned three transversal sections (superior, central, and inferior) within the 3 mm diameter zone of the central PCTF over a course of 20 s (left). Simultaneously, the TDF measured the lipid layer thickness of the entire 3 mm diameter zone over a course of 20 s (right)