Corneal abrasions most often occur when you get something lodged in your eye or something scratches the surface of it. The severity will depend on the size of the cut as well as how many layers of the cornea are affected out of the 5 there are. The depth will determine what stage of corneal abrasion you’re at, ranging from mild, to moderate, to severe. The most common causes of these types of injuries are dirt, sand, dust, bits of wood or metal, make-up brushes/wands, and fingernails. Depending on the severity of your abrasion, and what stage you’re at in the healing process, you may experience symptoms such as: - Blurred vision. - Eye pain. - Feeling like something is present in your eye. - Red eyes. - Sensitivity to light. - Swollen eyes or eyelids. - Watery eyes.