Cornea is the transparent and clear protective layer covering eyes, against from dust, bateria, and other damages to the inner soft and delicate tissue of eyes. It plays key role in vision. It could help filter the UV rays and the light needs to travel through it firstly and then into lens. It provides most of the refractive power for vision and the correct curvature of cornea determines correct vision. Usually, the corneal abrasion could heal quickly. Cornea might get scar because of injury, infection or surgery. The corneal scarring might lead to serious results , varying from blurry vision to vision loss. If you confirmed you got scarring, then you need to visit your ophthalmologist and ask for the professional help. Because once the scar formed on the cornea, it is permanent and it can't disappear. You vision would be very bad and cloudy. If it is needed, you might need a surgery to replace your cornea to restore your vision. Given now the success rate of corneal transplant is quite high, it is safe if your doctor requires such surgery. To see whether you need such surgery, it is depending on how much your vision is impaired. Good luck!