Anisometropia
From Wikipedia, the free encyclopedia
| ICD-10 | H52.3 |
|---|---|
| ICD-9 | 367.31 |
Anisometropia is the condition in which the two eyes have unequal refractive power; that is, are in different states of myopia (nearsightedness) or hyperopia (farsightedness), the unequal refractive states cause unequal rotations thus leading to diplopia and asthenopia.
Anisometropia can adversely affect the development of binocular vision in infants and children if there is a large difference in clarity between the two eyes. The brain will often suppress the vision of the blurrier eye in a condition called amblyopia, or lazy eye.
[edit] Spectacle correction
For those with large degrees of anisometropia, spectacle correction may cause the person to experience a difference in image magnification between the two eyes which could also prevent the development of good binocular vision.
One study estimated that 6% of those between the ages of 6 and 18 have anisometropia[1]
The name is from four Greek components: an- "not," iso- "same," metr- "measure," ops "eye."
[edit] References
- ^ Czepita D, Goslawski W, Mojsa A. "[Occurrence of anisometropia among students ranging from 6 to 18 years of age.]" Klin Oczna. 2005;107(4-6):297-9. Polish. PMID 16118943.
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eyelid, lacrimal system and orbit: Stye - Chalazion - Blepharitis - Entropion - Ectropion - Lagophthalmos - Blepharochalasis - Ptosis - Xanthelasma
conjunctiva: Conjunctivitis - Pterygium - Subconjunctival hemorrhage
sclera, cornea, iris and ciliary body: Scleritis - Keratitis - Corneal ulcer - Snow blindness - Thygeson's superficial punctate keratopathy - Fuchs' dystrophy - Keratoconus - Keratoconjunctivitis sicca - Iritis - Uveitis
lens: Cataract
choroid and retina: Retinal detachment - Retinoschisis - Hypertensive retinopathy - Diabetic retinopathy - Retinopathy - Retinopathy of prematurity - Macular degeneration - Retinitis pigmentosa - Macular edema
ocular muscles, binocular movement, accommodation and refraction: Strabismus - Ophthalmoparesis - Progressive external ophthalmoplegia - Esotropia - Exotropia - Refractive error - Hyperopia - Myopia - Astigmatism - Anisometropia - Presbyopia
Visual disturbances and blindness: Amblyopia - Leber's congenital amaurosis - Scotoma - Color blindness - Achromatopsia - Nyctalopia - Blindness
Commonly associated infectious diseases: Trachoma Onchocerciasis
Other: Glaucoma - Floater - Leber's hereditary optic neuropathy - Red eye - Argyll Robertson pupil - Keratomycosis - Xerophthalmia - Aniridia
