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Vein Occlusion

A loss of vision is often noticed when waking up but may not be apparent due to the overlap of visual field in the two eyes. The event is usually painless.

A branch vein occlusion frequently occurs close to the optic disc at the first main artery/vein crossing. Although vision may be relatively severely affected prognosis remains good. With time, usually 2-3 months, the haemorrhages reabsorb and vision improves to normal.

Hypertension or arterio sclerosis are primary causes although raised pressure in chronic glaucoma or other blood disorders can also lead to occlusion.

The retinal veins appear engorged, tortuous and dark and the optic disc is swollen. Haemorrhages occur along the vessels and extend to the periphery.

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