Fig. 8From: An imaging system integrating optical coherence tomography and interferometry for in vivo measurement of the thickness and dynamics of the tear filmThe 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)Back to article page