<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2604-1227</journal-id>
<journal-title><![CDATA[Revista mexicana de oftalmología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. oftalmol]]></abbrev-journal-title>
<issn>2604-1227</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Oftalmología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2604-12272022000200057</article-id>
<article-id pub-id-type="doi">10.24875/rmo.m22000221</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Un estudio transversal sobre biometría ocular y cambios paramétricos entre gemelos idénticos y no idénticos]]></article-title>
<article-title xml:lang="en"><![CDATA[A cross-sectional study on ocular biometrics and parametric changes between identical and non-identical twins]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kalikivayi]]></surname>
<given-names><![CDATA[Venkataramana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kalikivayi]]></surname>
<given-names><![CDATA[Lavanya]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ahalia Foundation Eye Hospital Ahalia School of Optometry ]]></institution>
<addr-line><![CDATA[Palakkad ]]></addr-line>
<country>India</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>96</volume>
<numero>2</numero>
<fpage>57</fpage>
<lpage>63</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2604-12272022000200057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2604-12272022000200057&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2604-12272022000200057&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Se diseñó un estudio transversal prospectivo para descubrir la biometría ocular y los cambios paramétricos entre gemelos idénticos y no idénticos en la población india, ya que estos no se estudiaron antes a pesar de existir varios estudios de gemelos en el mundo.  Método: Se identificó una muestra de conglomerados de poblaciones gemelas de la aldea de Kodinhi, en India. Se midieron varios parámetros oculares junto con la biometría para grupos de gemelos idénticos y no idénticos.  Resultados: Participaron 19 pares de gemelos, de los cuales 7 eran idénticos y 12 no idénticos. Se encontró que la prevalencia de errores refractivos entre los 19 pares de gemelos era del 10.5%, con un 7.9% de miopía y un 2.6% de hipermetropía. Entre los gemelos no idénticos, la prevalencia de miopía fue del 12.5%, la de hipermetropía fue del 4.2% y la de emetropía fue del 83.3%. No hubo significación estadística para todos los parámetros entre gemelos no idénticos y entre el primer y el segundo gemelo (p &gt; 0.05). La rotura del punto próximo de convergencia (PPC), la recuperación del PPC y la sensibilidad al contraste de ambos ojos revelaron significación estadística (p &lt; 0.05) entre los ojos de 7 gemelos idénticos. El punto próximo de acomodación del ojo derecho, la profundidad de la cámara anterior en el ojo izquierdo, la sensibilidad al contraste y la longitud axial de ambos ojos revelaron significación estadística (p &lt; 0.05) entre gemelos idénticos y no idénticos.  Conclusiones: Este trabajo concluye que todos los errores de refracción se observaron solo en gemelos no idénticos, mientras que todos los gemelos idénticos fueron emétropes. Los parámetros que mostraron una variación estadísticamente significativa fueron la convergencia y la sensibilidad al contraste entre gemelos idénticos, junto con la acomodación, la profundidad de la cámara anterior, la sensibilidad al contraste y la longitud axial entre gemelos idénticos y no idénticos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: Prospective cross-sectional study designed to find out the ocular bio-metrics and parametric changes between identical and non-identical twins in the Indian population as these have not been studied earlier despite several twin studies present globally.  Methods: A cluster sample of twin populations from the Kodinhi village, India, was identified. Various ocular and biometric parameters were measured in identical and non-identical twin groups.  Results: A total of 19 twin pairs participated in the study, 7 of whom were identical twins, and 12 non-identical. The prevalence of refractive errors among all 19 twin pairs was 10.5%, with 7.9% myopia and 2.6% hyperopia. Among non-identical twins, the prevalence of myopia was 12.5%, hyperopia 4.2%, and emmetropia 83.3%. There was no statistical significance for all the parameters among non-identical twins or between the first and second twin with p &gt; 0.05. The punto próximo de convergencia (PPC) break, PPC recovery, and contrast sensitivity of both eyes revealed a statistical significance of p &lt; 0.05 between the eyes of 7 identical twins. The near point of accommodation of the right eye, the anterior chamber depth (ACD) of the left eye, contrast sensitivity, and the axial length (AL) of both the eyes revealed a statistical significance of p &lt; 0.05 between identical and non-identical twins.  Conclusion: This study concludes that all refractive errors were seen in non-identical twins only while all identical twins were emmetropic. The parameters that showed statistically significant variation were convergence and contrast sensitivity among identical twins along with accommodation, ACD, contrast sensitivity, and AL between identical and non-identical twins.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Gemelos idénticos]]></kwd>
<kwd lng="es"><![CDATA[Gemelos no idénticos]]></kwd>
<kwd lng="es"><![CDATA[Biometría]]></kwd>
<kwd lng="es"><![CDATA[Sensibilidad al contraste]]></kwd>
<kwd lng="es"><![CDATA[Visión del color]]></kwd>
<kwd lng="es"><![CDATA[Queratometría]]></kwd>
<kwd lng="en"><![CDATA[Identical twins]]></kwd>
<kwd lng="en"><![CDATA[Non-identical twins]]></kwd>
<kwd lng="en"><![CDATA[Biometry]]></kwd>
<kwd lng="en"><![CDATA[Contrast sensitivity]]></kwd>
<kwd lng="en"><![CDATA[Color vision]]></kwd>
<kwd lng="en"><![CDATA[Keratometry]]></kwd>
</kwd-group>
</article-meta>
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