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Aniseikonia (anisoeikonia in British English) is an ophthalmological condition caused by unequal retinal image sizes. This condition is typically the result of unequal refractive errors. Patients experiencing aniseikonia typically have difficulty fusing the images of the left and right eyes causing discomfort, visual confusion and even headaches. Refractive aniseikonia is best corrected by contact lens. Contact lenses minimize the magnification/minification caused by glasses. The most common cause of aniseikonia is aphakia.
| 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 | Retinitis - Chorioretinitis - Choroideremia - Retinal detachment - Retinoschisis - Retinopathy (Hypertensive retinopathy, Diabetic retinopathy, Retinopathy of prematurity) - Macular degeneration - Retinitis pigmentosa - Retinal haemorrhage - Central serous retinopathy - Macular edema - Epiretinal membrane - Macular pucker |
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| Optic nerve and visual pathways | Optic neuritis - Papilledema - Optic atrophy - Leber's hereditary 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 - 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 |
