Table 1.

OSD Classification According to Each Parameter Studied

	0. None	1. Mild	2. Moderate	3. Severe
OSDI Score	<13	13–22	23–32	>33
FBUT (seconds)	8–15	7–5	4–1	Immediate
Fluorescein staining	0–1	2–4	5–9	10–15
Lissamine green staining	0–1	2–3	4–5	6–9
Schirmer test (mm)	>10	10–5	5–1	0
Meiboscore	0	1	2	3
Tear meniscus height (mm)	>0.3	0.3–0.2	0.2–0.1	0.1–0

Note: Criteria used for dry eye disease severity classification.

Abbreviations: OSDI, Ocular Surface Disease Index; FBUT, Fluorescein Breakup Time; mm, millimeters.