Corneal epithelial abrasions were categorized to five stages which were no abrasions, mild, medium, severe and extremely severe with 5.49%, 31.87%, 43.96%, 12.09% and 5.59% respectively.
Trầy biểu mô giác mạc nhẹ 31,87%; trung bình 43,96%; nặng 12,09%; rất nặng 6,59%.