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    Eye refraction in doubly exchanged monozygotic twins

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    TY - GEN T1 - Eye refraction in doubly exchanged monozygotic twins UR - http://hdl.handle.net/20.500.12495/2109 PB - Cambridge University Press AB - ER - @misc{20.500.12495_2109, author = {}, title = {Eye refraction in doubly exchanged monozygotic twins}, year = {}, abstract = {}, url = {http://hdl.handle.net/20.500.12495/2109} }RT Generic T1 Eye refraction in doubly exchanged monozygotic twins LK http://hdl.handle.net/20.500.12495/2109 PB Cambridge University Press AB OL Spanish (121)
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    Author
    Segal, Nancy L.
    Montoya, Yesika S.
    Peña, Fernando Y.
    Burgos, Stephany
    Katz, Ximena
    Date
    2019
    Published in
    Twin Research and Human Genetics, 1832-4274, Vol 22, Num 3, 2019, pag 177-182
    Published for
    Cambridge University Press
    URI
    http://hdl.handle.net/20.500.12495/2109
    Source's URL
    https://www.cambridge.org/core/journals/twin-research-and-human-genetics/article/eye-refraction-in-doubly-exchanged-monozygotic-twins/75706976652654478AA575D814E08A46
    DOI
    https://doi.org/10.1017/thg.2019.26

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    Abstract
    This case study examined the hypothesis that longer outdoor time results in normal vision and refractive status, using unique genetically informative kinships. The participants were the members of 29-year-old doubly exchanged monozygotic male twin pairs from Bogotá, Colombia, in South America. Comprehensive ophthalmological examinations, including uncorrected and corrected visual acuity, refraction and keratometry, and visual life history interviews were undertaken; all examinations were conducted by two ophthalmologists blind to the hypothesis, relatedness, and rearing status of the four participants. Normal uncorrected vision and refractive status were present in the two rural-raised, unrelated brothers, relative to their urban-raised counterparts. Uncorrected visual acuities were 20/160 and 20/200 for the city-raised twins and 20/20 and 20/30 for the country-raised twins. Premature birth, low birth weight, computer use, and reading time could not explain these differences. It was concluded that time spent outdoors appears to be a significant factor in the development of myopia, reinforcing extant findings via a novel experimental approach.
    Keywords
    Myopia
    Prevention and control
    Twin study
    Topics
    Errores de refracción
    Gemelos monocigóticos
    Informes de casos
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