Clinical features
These include:
- rapid onset of episode of blindness, developing within 10 to 15 seconds
- often the blindness develops as if a shade were drawn upward or downward over the eye, rarely sideward
- lasts for seconds or minutes
- clears slowly and uniformly from the reverse direction in which lost
- may be an associated contralateral hemiparesis if the cause is carotid artery stenosis
Less commonly, there is a generalised dimness of vision rather than a complete loss or only part of the visual field may be lost.
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