<?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>S2604-12272020000200068</article-id>
<article-id pub-id-type="doi">10.24875/rmo.m20000105</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de la cirugía de catarata en la sensibilidad al contraste y la calidad de vida de pacientes con diferentes tipos de catarata]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of cataract surgery on contrast sensitivity and quality of life in patients with different types of cataract]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Berríos-Dolz]]></surname>
<given-names><![CDATA[Valentina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chirinos-Saldaña]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Adrianzén]]></surname>
<given-names><![CDATA[Rosa E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Regional de Oftalmología Javier Servat Univazo  ]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Trujillo  ]]></institution>
<addr-line><![CDATA[Trujillo ]]></addr-line>
<country>Perú</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>94</volume>
<numero>2</numero>
<fpage>68</fpage>
<lpage>76</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2604-12272020000200068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2604-12272020000200068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2604-12272020000200068&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Determinar el efecto de la cirugía de catarata en la sensibilidad al contraste y calidad de vida de pacientes con diferentes tipos de catarata.  Métodos: Estudio prospectivo, con diseño pretest-postest en pacientes con indicación de cirugía de catarata por facoemulsificación. Se evaluó la agudeza visual mejor corregida (AVMC) a diferentes niveles de contraste y la calidad de vida relacionada con la visión (CVRV) antes y después de 30 días de la cirugía. La población se dividió en tres grupos comparativos según el tipo de catarata predominante siguiendo la clasificación LOCS III (Lens Opacity Cataract System): nuclear, cortical y subcapsular posterior (SCP).  Resultados: Se evaluaron 78 ojos de 78 pacientes con edad promedio 69.3 ± 9.6 (51-84) años. En el preoperatorio, la sensibilidad al contraste bajo estuvo alterada levemente en el grupo nuclear y severamente en el grupo SCP. El puntaje de la escala limitaciones de la CVRV fue significativamente menor para el grupo SCP comparado con el grupo nuclear (0 [0-15.6] vs. 6.2 [0-12.5]; p = 0.040). Luego de la cirugía, la AVMC y la sensibilidad al contraste mejoraron en los tres grupos de estudio. Los cambios de mayor significancia se observaron en el grupo SCP. La mejoría en la CVRV se relacionó positivamente con la ganancia de agudeza visual en alto y bajo contraste en los tres grupos de estudio.  Conclusión: La cirugía de catarata mejoró significativamente la sensibilidad al contraste y la calidad vida de todos los pacientes, especialmente en quienes presentaron opacidad SCP.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To determine the effect of cataract surgery on contrast sensitivity and quality of life of patients with different types of cataract.  Methods: Prospective study with a pre- and post-test design in patients with indication for cataract surgery by phacoemulsification. Best-corrected visual acuity (BCVA) at different contrast levels and vision-related quality of life (V-RQOL) were evaluated before and 30 days after surgery. The study population was divided into 3 comparative groups according to the type of predominant cataract following the Lens Opacities Classification System III: nuclear, cortical and posterior subcapsular (PSC).  Results: Seventy-eight eyes of 78 patients with a mean age of 69.3 ± 9.6 (51–86) years were included. In the preoperative period, low contrast sensitivity was slightly affected in the nuclear group and severely affected in the PSC group. V-RQOL limitations scale was significantly lower for the PSC group compared to the nuclear group (0 [0-15.6] vs. 6.2 [0-12.5]; p = 0.040). After surgery, BCVA and contrast sensitivity improved in the three study groups. The most significant changes were observed in the PSC group. V-RQOL improvement was positively related to visual acuity gain in high and low contrast in the three study groups.  Conclusion: Cataract surgery significantly improved contrast sensitivity and quality of life of all patients, especially in those with PSC opacity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Catarata]]></kwd>
<kwd lng="es"><![CDATA[Agudeza visual]]></kwd>
<kwd lng="es"><![CDATA[Calidad de vida]]></kwd>
<kwd lng="es"><![CDATA[Sensibilidad de contraste]]></kwd>
<kwd lng="es"><![CDATA[Facoemulsificación]]></kwd>
<kwd lng="es"><![CDATA[Encuestas y cuestionarios]]></kwd>
<kwd lng="en"><![CDATA[Cataract]]></kwd>
<kwd lng="en"><![CDATA[Visual acuity]]></kwd>
<kwd lng="en"><![CDATA[Quality of life]]></kwd>
<kwd lng="en"><![CDATA[Contrast sensitivity]]></kwd>
<kwd lng="en"><![CDATA[Phacoemulsification]]></kwd>
<kwd lng="en"><![CDATA[Surveys and questionnaires]]></kwd>
</kwd-group>
</article-meta>
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<person-group person-group-type="author">
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<article-title xml:lang=""><![CDATA[In a randomized controlled trial, cataract surgery in both eyes increased benefits compared to surgery in one eye only]]></article-title>
<source><![CDATA[J Clin Epidemiol]]></source>
<year>2006</year>
<volume>59</volume>
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