Table 1.

Grading Scales for Objective Clinical Signs

Signs	Score	Definition
Palpebral conjunctiva
Hyperemia	3	Impossible to distinguish individual blood vessels
	2	Dilatation of many vessels
	1	Dilatation of several vessels
	0	None
Edema	3	Diffuse edema with opacity
	2	Thinner diffuse edema
	1	Slight edema
	0	None
Follicles	3	20 or more follicles
	2	10–19 follicles
	1	1–9 follicles
	0	None
Papillae	3	Papillae size: 0.6 mm or more
	2	Papillae size: 0.3–0.5 mm
	1	Papillae size: 0.1–0.2 mm
	0	None
Giant papillae (papillae size ≥ 1 mm)	3	Elevated papillae in 1/2 or more of the upper palpebral conjunctiva
	2	Elevated papillae in <1/2 of the upper palpebral conjunctiva
	1	Flat papillae
	0	None
Bulbar conjunctiva
Hyperemia	3	Diffuse dilated blood vessels over the entire bulbar conjunctiva
	2	Dilatation of many vessels
	1	Dilatation of several vessels
	0	None
Edema	3	Bullous edema
	2	Thinner diffuse edema
	1	Localized edema
	0	None
Limbus
Trantas’ dot	3	9 or more dots
	2	5–8 dots
	1	1–4 dots
	0	None
Swelling	3	Found in 2/3 or more of the limbal circumference
	2	Found in 1/3 to <2/3 of the limbal circumference
	1	Found in <1/3 of the limbal circumference
	0	None
Corneal epithelial signs	3	Shield ulcer or corneal erosion
	2	Exfoliation superficial punctate keratitis
	1	Superficial punctate keratitis
	0	None