<?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>S2604-12272024000200003</article-id>
<article-id pub-id-type="doi">10.24875/rmo.m25000271</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis del colgajo corneal en FEMTO-LASIK utilizando dos diferentes métodos de acople con el sistema LDV Z8]]></article-title>
<article-title xml:lang="en"><![CDATA[Corneal flap analysis in FEMTO-LASIK using two different coupling methods with the LDV Z8 system]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pineros]]></surname>
<given-names><![CDATA[Oscar E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Urrego]]></surname>
<given-names><![CDATA[Leidy J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salamanca]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle Servicio de Oftalmología ]]></institution>
<addr-line><![CDATA[Cali ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2024</year>
</pub-date>
<volume>98</volume>
<numero>2</numero>
<fpage>46</fpage>
<lpage>52</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2604-12272024000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2604-12272024000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2604-12272024000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Evaluar el grosor, la uniformidad y la morfología del colgajo corneal en dos diferentes métodos de acople entre la pieza de mano del láser y el ojo del paciente.  Método: Estudio retrospectivo de serie de casos. Se incluyeron 123 ojos de 67 pacientes a los que se realizó FEMTO LASIK entre diciembre de 2016 y febrero de 2018. Los pacientes se dividieron en dos grupos: grupo 1 con acople en un tiempo (la pieza de mano del láser y el anillo de succión se acoplan simultáneamente sobre la córnea) y grupo 2 con acople en dos tiempos (se posiciona primero el anillo de succión sobre el ojo del paciente y luego se acopla la pieza de mano sobre el anillo). La medición del colgajo corneal se hizo 1 semana después de realizado el procedimiento quirúrgico con el tomógrafo corneal RTVue. Se midió el grosor del colgajo corneal en el meridiano horizontal y vertical a 0.5, 1.0, 1.5, 2.0 y 2.5 mm del vertex corneal (20 medidas por ojo en total). El grosor del colgajo corneal se programó en 110 µm.  Resultados: Defecto refractivo preoperatorio en el grupo 1 (70 ojos), esfera -2.50 D a +1.83 D, cilindro 0.87 D, y en el grupo 2 (53 ojos) esfera -2.24 D a +2.76 D, cilindro 0.59 D (no se encontró diferencia significativa entre los grupos). Grosor central del colgajo corneal en el grupo 1 de 107.5 ± 3 µm (rango: 99-114) y en el grupo 2 de 112.5 ± 5 µm (rango: 100-122) (p &lt; 0.05). Grosor del colgajo corneal en los diferentes meridianos, en el grupo 1, nasal 108.1 µm, superior 108.1 µm, temporal 107.9 µm e inferior 107.7 µm, y en el grupo 2, nasal 112.4 µm, superior 112.5 µm, temporal 112.6 µm e inferior 112.4 µm. Grosor del colgajo corneal a diferentes distancias del vertex, en el grupo 1, a 0.5 mm 107.5 µm, a 1.0 mm 107.9 µm, a 1.5 mm 107.9 µm, a 2.0 mm 108.2 µm y a 2.5 mm 108.8 µm, y en el grupo 2, a 0.5 mm 112.5 µm, a 1.0 mm 112.5 µm, a 1.5 mm 112.6 µm, a 2.0 mm 112.5 µm y a 2.5 mm 112.8 µm.  Conclusiones: Se obtuvieron colgajos corneales más delgados en el grupo 1 y más gruesos en el grupo 2 comparados con el grosor programado y con una baja desviación estándar. El análisis en los diferentes meridianos y zonas mostró un colgajo corneal de grosor uniforme y con una morfología plana, muy similar con los dos métodos de acople de la pieza de mano del láser LDV Z8.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To evaluate the thickness, uniformity and morphology of the corneal flap in two different coupling methods between the laser handpiece and the patient's eye.  Method: Retrospective study of a case series. 123 eyes of 67 patients who underwent FEMTO LASIK between December 2016 and February 2018 were included. The patients were divided into two groups: group 1 with one-stage coupling method (the laser handpiece and the ring of suction are simultaneously attached to the cornea) and group 2 -with two-stage coupling method (the suction ring is first positioned over the patient's eye and then the handpiece is attached to the ring). The corneal flap measurement was made one week after the surgical procedure with the RTVue corneal tomograph. Corneal flap thickness was measured at the horizontal and vertical meridian at 0.5, 1.0, 1.5, 2.0 and 2.5 mm from the corneal vertex (20 measurements per eye in total). The thickness of the corneal flap was programmed at 110 µm.  Results: Preoperative refractive error in group 1 (70 eyes), sphere -2.50 D to +1.83 D, cylinder 0.87 D, and in group 2 (53 eyes) sphere -2.24 D to +2.76 D, cylinder 0.59 D (no significant difference was found in both groups). Central thickness of the corneal flap, in group 1, 107.5 ± 3 µm (range: 99-114 µm), and in group 2 112.5 ± 5 µm (range: 100-122) (p &lt; 0.05). Corneal flap thickness in the different meridians, in group 1, nasal 108.1 µm, superior 108.1 µm, temporal 107.9 µm and inferior 107.7 µm, and in group 2, nasal 112.4 µm, superior 112.5 µm, temporal 112.6 µm and inferior 112.4 µ. Corneal flap thickness at different distances from the vertex, in group 1, at 0.5 mm 107.5 µm, at 1.0 mm 107.9 µm, at 1.5 mm 107.9 µm, at 2.0 mm 108.2 µm and at 2.5 mm 108.8 µ, and in group 2, at 0.5 mm 112.5 µm, at 1.0 mm 112.5 µm, at 1.5 mm 112.6 µm, at 2.0 mm 112.5 µm and at 2.5 mm 112.8 µm.  Conclusions: Thinner corneal flaps were obtained in group 1 and thicker in group 2 compared to the programmed thickness and with a low standard deviation. The analysis in the different meridians and zones showed a corneal flap of uniform thickness and with a flat morphology, very similar in the two coupling methods of the LDV Z8 laser handpiece.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Córnea]]></kwd>
<kwd lng="es"><![CDATA[Cirugía láser de córnea]]></kwd>
<kwd lng="es"><![CDATA[LASIK]]></kwd>
<kwd lng="es"><![CDATA[Topografía corneal]]></kwd>
<kwd lng="en"><![CDATA[Cornea]]></kwd>
<kwd lng="en"><![CDATA[Corneal laser surgery]]></kwd>
<kwd lng="en"><![CDATA[LASIK]]></kwd>
<kwd lng="en"><![CDATA[Corneal topography]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<source><![CDATA[J Refract Surg]]></source>
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<volume>28</volume>
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</article>
