Table III.

Grading of clinical signs (as used in Figure 2)

Sign	Grade 0	Grade 1	Grade 2	Grade 3
Conjunctival redness	none	pink	light red	bright red
Lid margin debris	none	1-5 crusts	6-10 crusts	>10 crusts
Lid margin redness	none	pink	light red	bright red
MG expression	touch	light pressure	moderate pressure	occluded
MG secretion	clear	turbid	turbid with clumps	solid paste
MG plugging	Number of plugged orifices within the central 10 glands of lower lid
TBUT	Number of seconds to first breakup following complete blink