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KMID : 0213520100240050314
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Korean Journal of Ophthalmology
2010 Volume.24 No. 5 p.314 ~ p.317
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Two Cases of Mirror-Image Eye Anomalies in Monozygotic Twins
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Kim Wook-Kyum
Chung Seung-Ah
Lee Jong-Bok
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Abstract
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We report two cases of mirror image anomalies in two different pairs of monozygotic twins. In case 1, the twins exhibited mirroring of strabismus and refractive errors. Twin 1 had 35 prism diopters (PD) right intermittent exotropia at distant fixation and myopic anisometropia that was spherical 2.00 diopters more myopic in the right eye. Twin 2 had 35 PD left intermittent exotropia at distant fixation and her left eye was more myopic by - spherical 1.00 diopters. In case 2, the twins were diagnosed with infantile nystagmus with upbeat jerk. Twin 1 exhibited a habitual head turn of 30° to the left with dampening of her nystagmus in dextroversion. Twin 2 also exhibited abnormal head position, but in his case the habitual turn was 30° to the right. We believe that this is the first report describing mirror imaged intermittent exotropia with anisometropia and infantile nystagmus with opposite abnormal head positions in pairs of monozygotic twins.
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KEYWORD
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Anisometropia, Identical twins, Infantile nystagmus, Intermittent exotropia, Mirror image anomaly
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