DR P. MARAZZI / SCIENCE PHOTO LIBRARY DR P. MARAZZI / SCIENCE PHOTO LIBRARY
Bleeding in the eye. This is subconjunctival haemorrhage, the blood is beneath the conjunctiva, the transparent membrane that covers the eye. It may be caused by violent coughing or vomiting, or have no known cause. The condition is painless and generally heals without medical intervention.
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