Below we explain what Hemianopia is, what the symptoms are, how the condition is assessed and any available treatment options.

Hemianopia is the loss of sight in one half of the field of vision, usually to the same side in both eyes. It is the result of damage to the optic pathways from the eyes to the brain, often the result of stroke or brain injury. High blood pressure is a risk factor. Some brain growths can also present in this way.


  • Loss of sight to one side, but this may not be recognised by the affected person
  • Inability to read, especially if the loss is to the right side
  • There may be associated loss of visual awareness
  • Bumping into furniture etc. to one side only


  • If you are at risk of stroke, your risks increase for Hemianopia
  • High blood pressure or an abnormal heart rhythm
  • People over the age of 55


Early medical care may allow some recovery soon after the onset. Treatment can be done in some cases for the underlying cause. Visual rehabilitation training can be very helpful for someone with hemianopia, but optical aids are rarely useful.

Further online information

Sight Science


This information can be made available in Braille, or audio CD should you require it, from manchester@henshaws.org.uk

Explore our other pages on eye conditions

Retinitis pigmentosa | Cataracts | Charles Bonnet Syndrome | Chronic Glaucoma | Diabetic Retinopathy | Nystagmus | Macular degeneration


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