Severity score

Schirmer’s test (mm)

Corneal Fluorescein Staining (points)

Ocular Surface Disease Index (points)

Conjunctival injection (points)

0

>15

0

<13

None

1

11 - 15

<2

13 - 22

Mild/Moderate

2

6 - 10

2 - 3

23 - 32

Severe

3

≤5

≥4

≥33

Severe