Physical signs Scale Scale description
Persistant epithelial defect 0-3 0: no epithelial loss
+ : mild (epithelial loss < 5 mm diameter)
++ : moderate(> 5 mm < 7 mm diameter)
+++ : severe (> 7 mm diameter)
Punctate epithelial keratitis (PEK) 0-3 No PEK
+ : mild
++ : moderate
+++ : severe
Conjunctival epithelium on cornea 0
+
Absence
Presence
Corneal vascularization Number of vascular pediculus near the limbus Number
Vessels’ Activity 0-3 0: inactive¬† (absence of blood)
+: vessels of small diameter
++: vessels with different diameter sizes
+++ : vessels with large diameters and in the state of vasodilatation only
Functional signs Scale Scale description
Photophobia 0-3 0: no complaint
+: fear of luminosity corrected by sunglasses
++: frequent winking to light
+++: impossibility to open eyes
Watering 0-3 0: no complaint
+: dry
++: very dry
+++: eye stuck
Pain 0-3 0: no complaint
+: occasionally
++: repetitive pain during the day
+++: permanent
Table 1: Scale of each secondary criterion.