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Hemianopia Animation – Ellen Reid

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Following a stroke a patient will suffer from a number of functional deficits affecting their ability to mobilise, speak, think clearly to name only a few. The effect on the person is multifaceted and the way that they compensate will vary depending on many factors.

One of the lost functions that can cause difficulties for stroke survivors is when they lose the ability to see part of the world. A person’s visual field describes the full scope of human vision rather than how good the clarity of vision is.

The most common visual field deficit is a homonymous hemianopia.

This is when a person is unable to see half of the world in front of them, with this affecting both eyes. So if they close either eye, the blackness persists. This causes the person to be unable to read, watch TV and recognise dangers on the affected side. However, the unaffected side is still able to process visual signals normally.