Inclusion Criteria:  Age older than 18 years Corneal abrasion less than one third of the cornea  Exclusion Criteria:  Ocular surgery within prior 3 months in the affected eye Ocular injury within prior 3 months before abrasion in the affected eye Ocular herpes of eye or eyelid within prior 3 months Active ocular infection Active ocular inflammation or history of chronic, recurrent ocular inflammation within prior 3 months Ocular surface abnormality that may compromise corneal integrity Presence of diseases that reduce experience of pain (e.g. Diabetes mellitus) Pregnancy