Clinical features | Grade | |||
---|---|---|---|---|
 | normal | mild | moderate | severe |
Conjunctival hyperemia | absent | mild or sectoral engorgement of the conjunctival vessels | diffuse engorgement of the conjunctival vessels | significant engorgement of conjunctival vessels |
Corneal edema | absent | present with visible iris details | present without iris details | present without visible pupil |
Corneal epithelial defect | absent | defect involving less than one quarter of the corneal surface | defect involving one quarter to one half of the corneal surface | defect involving more than one half of the corneal surface |