(Hemianopia; Hemiopia; Bitemporal Hemianopsia; Homonymous Hemianopsia; Left Homonymous Hemianopsia; Right Homonymous Hemianopsia; Superior Hemianopsia; Inferior Hemianopsia)
- Outer half of each visual field (bitemporal)
- The same half of each visual field (homonymous)
- Right half of each visual field (right homonymous)
- Left half of each visual field (left homonymous)
- Upper half of each visual field (superior)
- Lower half of each visual field (inferior)
- Neurodegenerative disorders
- Toxin exposures
- Transient events, such as seizures or migraines
|The Optic Nerve|
|An injury or illness that puts pressure on the optic nerve can cause hemianopsia.|
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- Sensation that something is wrong with your vision
- Bumping into objects
- Difficulty reading
- Difficulty driving (eg, changing lanes when there is an oncoming car or sideswiping objects)
- Visual hallucinations, such as lights or shapes
- Visual field test—This is a test that makes a map of your field of vision. It is used to check whether there is damage to any area of vision. You will focus on a target in front of you and respond to lights that flash above, below, and to the right and left of the target.
- Magnetic resonance imaging (MRI) scan —This is a test that uses magnetic waves to make pictures of structures inside the brain. It will show if there is damage to your brain in an area that affects vision.
- Make frequent head turns a habit. This will help you capture things outside your field of vision.
- When walking with others, place them on the affected side. For example, if you have a left homonymous hemianopsia, they should stay on your left side. This will prevent you from bumping into objects outside of your field of vision.
- In a theater, sit toward the affected side (eg, on the right if you have right homonymous hemianopsia). That way, more of the action will be within your field of vision.
- Talk to your doctor about whether you can drive. Some rehabilitation centers have driving simulators that measure your ability to drive safely.
- Use caution in situations where a brain injury could occur (eg, wear helmets when appropriate, reduce falling hazards, etc.).
- If you are at risk for stroke, talk to your doctor about ways to decrease your risk.
American Academy of Ophthalmology http://www.aao.org/
Lighthouse International http://www.lighthouse.org/
Canadian Ophthalmological Society http://www.eyesite.ca/
Canadian Stroke Network http://www.canadianstrokenetwork.ca/
Bashir K, Elble RJ, Ghobrial M, et al. Hemianopsia in dementia with lewy bodies. Arch Neurol . 1998 Aug;55(8):1132-5.
Bitemporal hemianopsia. Saint John’s Health Center: Brain Tumor Center website. Available at: http://www.brain-tumor.org/124%5FBitemporal%5FHemianopsia.html. Accessed June 9, 2011.
Hemianopsia. Texas School for the Blind and Visually Impaired website. Available at: http://www.tsbvi.edu/instructional-resources/986-hemianopsia. Updated February 2010. Accessed June 9, 2011.
Homonymous hemianopia. North American Neuro-Ophthalmology Society. Available at: http://www.nanosweb.org/files/public/Homonymous%5Fhemianopia.pdf. Accessed June 9, 2011.
Kedar S, Zhang X, Lynn MJ. Pediatric homonymous hemianopia. J AAPOS . 2006 Jun;10(3):249-52.
Mitchell JP, Yancy A, Louis LS, et al. Reversible hyperglycemic homonymous hemianopia. J Natl Med Assoc . 2009 Apr;101(4):373-6.
One-side neglect: improving awareness to speed recovery. American Heart and Stroke Association website. Available at: http://www.strokeassociation.org/STROKEORG/LifeAfterStroke/RegainingIndependence/EmotionalBehavioralChallenges/One-side-Neglect-Improving-Awareness-to-Speed-Recovery%5FUCM%5F309735%5FArticle.jsp. Accessed June 9, 2011.
Seeing after stroke: vision changes are common, some are reversible. National Stroke Association website. Available at: http://www.stroke.org/site/PageServer?pagename=SS%5FMAG%5Fsp2010%5Frehab. Accessed June 9, 2011.
Stroke related eye conditions. Royal National Institute of Blind People website. Available at: http://www.rnib.org.uk/eyehealth/eyeconditions/eyeconditionsoz/Pages/stroke.aspx. Updated May 2011. Accessed June 9, 2011.
What is hemianopia? Lighthouse international website. Available at: http://www.lighthouse.org/about-low-vision-blindness/vision-disorders/hemianopia/. Accessed June 9, 2011.
- Reviewer: Rimas Lukas, MD
- Review Date: 06/2011 -
- Update Date: 06/24/2011 -
This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.
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