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Homonymous hemianopsia
Classification and external resources
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| Paris as seen with left homonymous hemianopsia
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| ICD-10
| H53.4
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| ICD-9
| 368.46
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Homonymous hemianopsia is a medical term for a type of partial blindness resulting in a loss of vision in the same visual field of both eyes.
Causes
It is usually caused by injury to the brain itself such as stroke or trauma, rather than malfunctioning of the eye itself.
Vascular and neoplastic (malignant or benign tumours) lesions of the optic tract or visual cortex can cause a contralateral homonymous hemianopsia. For example, a person who has a lesion of the right optic tract will no longer see objects on their left side. Similarly, a person who has a stroke to the right occipital lobe will have the same visual field defect, but there will be macular sparing.
A stroke on the entire right side of the brain, in addition to producing a homonymous hemianopsia, will also lead to the syndrome of Hemispatial neglect.
However, the symptom of homonymous hemianopsia isn't necessarily of a lethal cause. For instance, it can constitute the aura phase of migraine.
Etymology
Homonymous hemianopsia can be broken down as follows:
- Homonymous: same
- hemi: half of the visual field
- anopsia: blindness
See also
| Pathology of the eye (primarily H00-H59, 360-379) |
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| Eyelid, lacrimal system and orbit | eyelid: inflammation (Stye, Chalazion, Blepharitis) - Entropion - Ectropion - Lagophthalmos - Blepharochalasis - Ptosis - Blepharophimosis - Xanthelasma - Trichiasis
lacrimal system: Dacryoadenitis - Epiphora - Dacryocystitis
orbit: Exophthalmos - Enophthalmos |
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| Conjunctiva | Conjunctivitis - Pterygium - Pinguecula - Subconjunctival hemorrhage |
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| Sclera and cornea | Scleritis - Keratitis - Corneal ulcer - Snow blindness - Thygeson's superficial punctate keratopathy - Fuchs' dystrophy - Keratoconus - Keratoconjunctivitis sicca - Arc eye - Keratoconjunctivitis - Corneal neovascularization - Kayser-Fleischer ring - Arcus senilis - Band keratopathy |
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| Iris and ciliary body | Iritis - Uveitis - Iridocyclitis - Hyphema - Persistent pupillary membrane - Iridodialysis - Synechia |
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| Lens | Cataract - Aphakia - Ectopia lentis |
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| Choroid and retina | Birdshot chorioretinopathy - Retinitis - Chorioretinitis - Choroideremia - Retinal detachment - Retinoschisis - Retinopathy (Bietti's crystalline dystrophy, Coats disease, Diabetic retinopathy, Hypertensive retinopathy, Retinopathy of prematurity) - Macular degeneration - Retinitis pigmentosa - Retinal haemorrhage - Central serous retinopathy - Macular edema - Epiretinal membrane - Macular pucker - Vitelliform macular dystrophy - Leber's congenital amaurosis |
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| Optic nerve and visual pathways | Optic neuritis - Papilledema - Optic atrophy - Leber's hereditary optic neuropathy - Dominant optic atrophy - Optic disc drusen - Glaucoma - Toxic and nutritional optic neuropathy - Anterior ischemic optic neuropathy |
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Ocular muscles,
binocular movement,
accommodation and refraction | Paralytic strabismus: Ophthalmoparesis - Progressive external ophthalmoplegia - Palsy (III, IV, VI) - Kearns-Sayre syndrome
Other strabismus: Esotropia/Exotropia - Hypertropia - Heterophoria (Esophoria, Exophoria) - Brown's syndrome - Duane syndrome
Other binocular: Conjugate gaze palsy - Convergence insufficiency - Internuclear ophthalmoplegia - One and a half syndrome
Refractive error: Hyperopia/Myopia - Astigmatism - Anisometropia/Aniseikonia - Presbyopia |
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| Visual disturbances and blindness | Amblyopia - Leber's congenital amaurosis - Subjective (Asthenopia, Hemeralopia, Photophobia, Scintillating scotoma) - Diplopia - Scotoma - Anopsia (Binasal hemianopsia, Bitemporal hemianopsia, Homonymous hemianopsia, Quadrantanopia) - Color blindness (Achromatopsia) - Nyctalopia (Oguchi disease) - Blindness/Low vision |
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| Pupil | Anisocoria - Argyll Robertson pupil - Marcus Gunn pupil/Marcus Gunn phenomenon - Adie syndrome |
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| Infectious diseases | Trachoma - Onchocerciasis |
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| Other | Nystagmus - Miosis - Mydriasis - Glaucoma - Ocular hypertension - Floater - Leber's hereditary optic neuropathy - Red eye - Keratomycosis - Xerophthalmia - Aniridia |
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| See also congenital |
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
