<?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>S2604-12272021000600259</article-id>
<article-id pub-id-type="doi">10.24875/rmo.m21000200</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Comportamiento corneal inmediato tras facoemulsificación, por medio de tomografía de coherencia óptica de dominio espectral]]></article-title>
<article-title xml:lang="en"><![CDATA[Immediate corneal behavior after phacoemulsification, by means of spectral-domain optical coherence tomography]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvarez-Fernández]]></surname>
<given-names><![CDATA[Luis R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baca-Lozada]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Cano]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velasco-Ramos]]></surname>
<given-names><![CDATA[Regina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alegría-Gómez]]></surname>
<given-names><![CDATA[Elisa D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández-Vizcaya]]></surname>
<given-names><![CDATA[Oscar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Fundación Hospital Nuestra Señora de la Luz Institución de Asistencia Privada Departamento de Córnea y Cirugía Refractiva ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Fundación Hospital Nuestra Señora de la Luz Institución de Asistencia Privada Departamento de Investigación ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>95</volume>
<numero>6</numero>
<fpage>259</fpage>
<lpage>266</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2604-12272021000600259&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2604-12272021000600259&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2604-12272021000600259&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Describir los cambios corneales en las 24 horas posteriores a la facoemulsificación, por medio de tomografía de coherencia óptica de dominio espectral (OCT-SD).  Método: Estudio prospectivo, observacional, descriptivo, transversal y comparativo. Se utilizaron imágenes tomadas por OCT-SD en ojos sin antecedentes de cirugía intraocular y corneal, para determinar un promedio de grosor, densidad, reflectividad y características normales de cada capa corneal, en tres grupos etarios de 50-59 años, 60-69 años y 70-79 años. Se describieron las características de cada córnea en relación con el tiempo efectivo de facoemulsificación (EPT).  Resultados: Se analizaron 180 ojos, en donde el grosor etarios total en los tres grupos se encontró una p &lt; 0.0001 comparando las córneas de los ojos operados y no operados, en donde se obtuvo un aumento del 13% entre el grupo 1 y 2, y un aumento del 1% entre el grupo 2 y 3. La densidad comparada por grupos mostró p = 0.0028, p = 0.0011 y p &lt; 0.0001, con una disminución de &#8722;2.01% en el grupo 1, &#8722;4.13% en el grupo 2 y &#8722;5.07% en el grupo 3. A partir de un EPT &gt; 8 segundos se encontró una disminución en la reflectividad del estroma, la membrana de Descemet y el endotelio.  Conclusiones: El aumento del grosor corneal es inversamente proporcional a la densidad corneal, la reflectividad corneal presenta cambios significativos conforme aumenta el EPT y la cirugía de facoemulsificación produce múltiples cambios corneales observables por OCT-SD, a pesar de que en la lámpara de hendidura en ocasiones no se perciban.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To describe the corneal changes in the first 24 hours after phacoemulsification, by means of spectral-domain optical coherence tomography (SD-OCT).  Method: Prospective, observational, descriptive, cross-sectional and comparative study. Images taken by SD-OCT in eyes without a history of intraocular and corneal surgery were used to determine an average of thickness, density, reflectivity and normal characteristics of each corneal layer, in three age groups of 50-59 years, 60-69 years and 70-79 years. The characteristics of each cornea were described in relation to the effective phacoemulsification time (EPT).  Results: We analyzed 180 eyes, finding a p&lt;0.0001 for the total thickness in the 3 groups when comparing the corneas of the operated and non-operated eyes, where an increase of 13% was obtained between groups 1 and 2, and an increase of 1% between groups 2 and 3. The density compared by groups showed p = 0.0028, p = 0.0011 and p &lt; 0.0001, with a decrease of &#8722;2.01% in group 1, &#8722;4.13% in group 2 and &#8722;5.07% in group 3. From an EPT &gt;8 seconds, a decrease in the reflectivity of the stroma, Descemet’s membrane and endothelium was found.  Conclusions: The increase in corneal thickness is inversely proportional to corneal density; corneal reflectivity shows significant changes as EPT increases and phacoemulsification surgery produces multiple corneal changes observable by SD-OCT, despite the fact that they are sometimes not perceived by slit-lamp examination.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Facoemulsificación]]></kwd>
<kwd lng="es"><![CDATA[OCT-SD]]></kwd>
<kwd lng="es"><![CDATA[Grosor]]></kwd>
<kwd lng="es"><![CDATA[Densidad]]></kwd>
<kwd lng="es"><![CDATA[Reflectividad]]></kwd>
<kwd lng="es"><![CDATA[EPT]]></kwd>
<kwd lng="en"><![CDATA[Phacoemulsification]]></kwd>
<kwd lng="en"><![CDATA[SD-OCT]]></kwd>
<kwd lng="en"><![CDATA[Thickness]]></kwd>
<kwd lng="en"><![CDATA[Density]]></kwd>
<kwd lng="en"><![CDATA[Reflectivity]]></kwd>
<kwd lng="en"><![CDATA[EPT]]></kwd>
</kwd-group>
</article-meta>
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