Table 1.

Diagnostic criteria for meibomian gland dysfunction.

Ocular surface disease index questionnaire	Score > 12
Non-invasive tear film breakup time	< 10 s in at least one eye
Schirmer-1 test	> 5 mm after 5 min in at least one eye
Quality or expressibility score	≤ 20 years old: > 1  > 20 years old: ≥ 1