A black eye, periorbital hematoma, or shiner, is bruising around the eye commonly due to an injury to the face rather than to the eye. The name is given due to the color of bruising. The so-called black eye is caused by bleeding beneath the skin and around the eye. Sometimes a black eye can worsen if not referred to a doctor if not resolved after a few months, indicating a more extensive injury - potentially even a skull fracture, particularly if the area around both eyes has bruised (raccoon eyes), or if there has been a prior head injury. Although most black eye injuries are not serious, bleeding within the eye, called a hyphema, is serious and can reduce vision and damage the cornea. In some cases, abnormally high pressure inside the eyeball (ocular hypertension) can also result.
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