There are plenty of situations where small objects can easily get in your eye – while riding a bike, gardening or playing on the beach, for instance. If something gets in your eye, it may injure the cornea (the clear part on the front of your eye). A scratch on the surface of the cornea is known as “ corneal abrasion” or “corneal erosion.”
Small scratches (up to 4 millimeters) usually heal overnight, and bigger ones typically heal within two to three days. But they may lead to complications, so it's sometimes better to see a doctor.