Table 1.

Scoring of clinical conjunctival changes

Score	1	2	3	4
Conjunctival swelling*	Mild	Moderate with diffuse margin	Moderate with discrete margin	Severe with overhanging edge
Pigmentation over swelling	Loss of some pigment	Loss of some pigment	Depigmented	Depigmented
Hyperaemia	None	Generalised	Localised petechiae	Localised patchy, haemorrhagic appearance

*Localised in temporal area of upper lid.