High-speed particles may not only cause a corneal injury but may penetrate beyond the cornea, causing injury to deeper structures of the eye. An example of this would be a small metal fragment flying into the eye when a person is using a grinding wheel without protective eyewear. This represents a serious injury and demands immediate medical attention to guard against loss of vision. You can rinse your eye by tilting your head back and pouring water from a cup into your opened eye. You can also fill a sink with water and plunge your head into the water with eyes open.
Laboratories have chemical eye wash stations to do the same thing.
Rest with your eyes closed. After a doctor's treatment, you should rest your eyes to help the healing process. This means limited reading. You should also not drive until your doctor says it is safe for you to do so, because driving with impaired vision poses a danger. Instead, have someone drive you to the doctor's appointment or hospital.