Bruising and swelling of the eye is usually caused by subcutaneous bruising due to blunt contusion, which is a soft tissue injury in mild cases, and may lead to fracture or nerve injury in serious cases. The eye is surrounded by the eye socket, but the front of the eye is only protected by a thin eyelid, which is easily damaged by trauma, and the eye socket is rich in blood vessels and nerves, the impact of external forces may lead to rupture of the blood vessels, resulting in the formation of subcutaneous blood, which will lead to bruising and swelling of the eye, that is, the formation of blunt contusion injury of the eye. The severity of the injury is related to the size of the external force and the severity of the injured tissues. If only the soft tissues are injured, it is generally mild; if the nerves are injured, it may lead to eye movement disorder, visual impairment, etc. If it leads to a fracture, or even a misalignment, it may lead to nerve compression and local deformation, etc. The patient must go to the hospital in time. The patient must go to the ophthalmology department of the hospital for examination in time, and the doctor usually needs to do slit lamp microscopy, intraocular pressure examination, ophthalmic ultrasound examination, orbital CT examination, fundus examination, etc. to fully understand the severity of the injury, so as to facilitate timely intervention and treatment, and to avoid leaving sequelae.