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MODEL RELEASED. Benign eye tumour. Ophthalmoscope view of the inner eye of a patient with juxtapapillary retinal capillary haemangioma (RCH, dark red). This is a benign (non-cancerous) tumour formed from a dense cluster of capillaries in the retina (light-sensitive membrane) that grows close to the optic disc (blind spot, white). If left untreated, this growth may expand and affect the macula (centre, above the growth), which is crucial for visual acuity (sharpness). Treatment is by photodynamic therapy (PDT), in which light of a specific wavelength is used in combination with oxygen to kill off the excess capillaries. An alternative treatment is to use antibodies against the factors that cause the abnormal increase in capillary growth.

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