anisometropia


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anisometropia

 [an-i″so-mĕ-tro´pe-ah]
inequality in the refractive power of the two eyes, of considerable degree. adj., adj anisometrop´ic.

an·i·so·me·tro·pi·a

(an-ī'sō-me-trō'pē-ă),
A difference in the refractive power of the two eyes.
[aniso- + G. metron, measure, + ōps, sight]

anisometropia

/an·iso·me·tro·pia/ (-mĕ-tro´pe-ah) inequality in refractive power of the two eyes.anisometrop´ic

anisometropia

(ăn-ī′sə-mĭ-trō′pē-ə)
n.
A condition in which the refractive power of one eye differs from that of the other.

an·i′so·me·trop′ic (-trŏp′ĭk, -trō′pĭk) adj.
an·i′so·me·trop′i·cal·ly adv.

anisometropia

[anī′sōmetrō′pē·ə]
Etymology: Gk, anisos + metron, measure, ops, eye
an abnormal ocular condition characterized by a difference in the refractive powers of the eyes.

het·er·o·me·tro·pi·a

(het'ĕr-ō-mĕ-trō'pē-ă)
A condition in which the refraction is different in the two eyes.
Synonym(s): anisometropia.
[hetero- + G. metron, measure, + ōps, eye]

anisometropia

The condition in which the refraction (focus) is different in the two eyes. One eye may be normal and the other MYOPIC or HYPERMETROPIC, or one eye may be ASTIGMATIC. From the Greek an , not iso , equal and metron , a measure.

Anisometropia

An eye condition in which there is an inequality of vision between the two eyes. There may be unequal amounts of nearsightedness, farsightedness, or astigmatism, so that one eye will be in focus while the other will not.
Mentioned in: Amblyopia

anisometropia 

Condition in which the refractive state of a pair of eyes differs and therefore one eye requires a different lens correction from the other. Correction may induce aniseikonia and when the eyes deviate from the optical axes of the lenses, anisophoria. Uncorrected anisometropia of low amounts may cause eyestrain or diplopia. Large amounts rarely cause symptoms as one of the retinal images is typically suppressed or there is amblyopia. Syn. asymmetropia; heterometropia; heteropsia. See aniso-accommodation; antimetropia; differential prismatic effect; isometropia.
compound hypermetropic anisometropia See anisohypermetropia.
compound myopic anisometropia See anisomyopia.
mixed anisometropia See antimetropia.
simple anisometropia Anisometropia in which one eye is emmetropic and the other either hypermetropic (simple hypermetropic anisometropia) or myopic (simple myopic anisometropia).
Table A10 Approximate retinal image size differences (in %) for various anisometropias corrected by spectacles (vertex distance = 12 mm)
refractive anisometropia
anisometropia difference (D)axial anisometropia (%)*hyperopic (%)myopic (%)
1.00.251.501.25
1.50.372.251.88
2.00.503.002.50
2.50.623.753.12
3.00.754.503.75
3.50.875.254.38
4.01.006.005.00
4.51.126.755.62
5.01.257.506.25
5.51.378.256.88
6.01.509.007.50
* The two eyes are assumed to be of the same refractive power but of different lengths.The two eyes are assumed to be of the same length but of different refractive powers.
References in periodicals archive ?
Age at presentation, amount of anisometropia, compliance with or duration of occlusion therapy and other factors much less consistently predict ultimate visual outcomes.
00 diopter difference in anisometropia between the eyes with amblyopic vision reduction, visual acuity of 0.
7%) no further improvement occurred with refraction which can be attributed to high degrees of cataract, anisometropia, strabismus, high degree of refractive errors, macolapathy, etc.
In the study, researchers analyzed vision examinations in 118 older adults, followed up over 12 years--from an average age of 67 to 79 years --and found that the prevalence of anisometropia nearly doubled during the time span from about 16 percent to more than 32 percent.
Predisposing conditions for amblyopia are: a difference in refraction between eyes, or anisometropia (50%); strabismus (19%); a combination of both (27%); and more rarely, media opacification (4%).
Causes may for example include anisometropia (large difference in the spectacle correction between the two eyes) or congenital cataract.
Las valoraciones oftalmologicas entre los 3 y 6 meses y al ano de vida se realizan porque estos ninos preterminos tienen mayor riesgo que los ninos a termino de miopia, miopia alta, anisometropia y estrabismo (14).
right or left eye appear myopic in one photograph and hyperopic in the other photograph) Anisometropia indicated by a difference of >=2 mm (in a 4-8 mm pupil) between crescent sizes in the right and left eyes in either the upper or lower photograph.
anisometropia (a need for a different correction in each eye),