The red eyes are caused when small blood vessels on the surface of the eye (sclera) become enlarged and engorged with blood. This occurs as a result of insufficient oxygen supply to the cornea or the tissues covering the eyes. Generally, red eyes are not really a cause for concern but if it causes pain or impaired vision, this may be an indication of a serious problem. A variation of this condition is an area bright red, bloody, uniformly thick that forms in the sclera as a result of a small amount of bleeding. The bloody stain usually occurs upon awakening in the morning. It does not hurt but it looks horrible, and will clear within a few days.
This is called a bloody stain subconjunctival hemorrhage. Diagnosis If a red-eyed red-eyed episode persists for more than three days and / or you are experiencing any problems with pain and / or vision, it is imperative that you consult a doctor to determine the cause and help you find relief red eye. The cause is diagnosed by an eye exam and medical history. Your doctor may also perform a physical examination to rule out any other disease. The degree of redness is not generally correlate to how the situation is so serious, but you should consider your overall health status. The bloodshot eyes are not usually an isolated symptom but the result of another condition, and should consider the severity of other symptoms such as eye pain or impaired vision.