Blunt trauma to the eye can cause injury to the iris, anterior chamber angle, or ciliary body and result in a hyphema. Blood in the anterior chamber can layer out if the patient has been relatively immobile, or if the patient is active, it can be stirred up and obliterate a clear view of the iris. Vision is usually decreased, and pain and redness may be present. The patient shown here has maintained an upright position, and the red blood cells have settled in the eye. A hyphema is an ocular emergency, and the patient should be referred immediately to an ophthalmologist.