PAUL PARKER / SCIENCE PHOTO LIBRARY PAUL PARKER / SCIENCE PHOTO LIBRARY
Papilloedema. Ophthalmoscope view of the retina of the eye of a patient, showing papilloedema. Papilloedema is the congestion and swelling of the optic disc (upper right), the red circular region where the optic nerve enters the retina. Here, the condition has resulted in haemorrhaging (dark areas of bleeding) from the retinal blood vessels around the optic disc. Papilloedema results from increased pressure within the skull: such as from a cerebral tumour. It may also occur in malignant hypertension and occasionally in later stages of chronic nephritis. Headache and nausea may occur, with short episodes of visual loss. The underlying condition causing papilloedema must be treated.
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