%0 Journal Article
%T Astigmatismo despu¨¦s de cirug¨ªa refractiva corneal con l¨¢ser de exc¨ªmeros: Reporte preliminar Astigmatism after corneal refractive surgery with excimer laser: A preliminary report
%A Jos¨¦ L Aquino Fern¨¢ndez
%A Enrique J Machado Fern¨¢ndez
%J Revista Cubana de Oftalmolog£¿-a
%D 2005
%I Editorial Ciencias M¨¦dicas
%X Se realiz¨® un estudio retrospectivo, transversal y comparativo un mes despu¨¦s de la cirug¨ªa en 194 ojos de pacientes operados para corregir astigmatismos mi¨®pico e hipermetr¨®pico compuestos. Las variables estudiadas fueron queratometr¨ªa K, astigmatismo queratom¨¦trico, astigmatismo refractivo, equivalente esf¨¦rico, astigmatismo queratom¨¦trico corregido y astigmatismo refractivo corregido. Se realizaron estad¨ªsticas descriptivas mediante el test T para muestras dependientes con nivel de significaci¨®n estad¨ªstica cuando p < 0,05. Se produjo una disminuci¨®n de 5 D (promedio) en la queratometr¨ªa que justifica los cambios del resto de las variables. Se observaron cambios estad¨ªsticamente significativos en todas las variables estudiadas con tendencia a la emetropizaci¨®n. El equivalente esf¨¦rico sufri¨® una variaci¨®n promedio mayor de 5 D lo que significa un acercamiento de las l¨ªneas focales y regularizaci¨®n del conoide y una mayor correcci¨®n en el astigmatismo refractivo que el queratom¨¦trico. Apareci¨® despu¨¦s de la cirug¨ªa un peque o grupo de pacientes en el que se encontraron peque os grados de astigmatismo que no aparec¨ªa antes de la cirug¨ªa y que se denomin¨® astigmatismo inducido. Este fue mayor en el caso del astigmatismo queratom¨¦trico A retrospective, cross-sectional and comparative study was conducted a month after performing surgery in 194 eyes to correct compound myopic and hypermetropic astigmatisms. The studied variables were K keratometry, keratometric astigmatism, refractive astigmatism, spherical equivalent, corrected keratometric astigmatism and corrected refractive astigmatism. Descriptive statistics were attained by the T test for depending samples with a statistical significance level p < 0.05. A reduction of 5 D (average) was obtained in keratometry that justifies the changes of the rest of the variables. Statistically significant changes were observed in all the studied variables with tendency towards emmetropization. The spherical equivalent suffered an average variation over 5 D, which means an approach of the focal lines and conoid regularization, and a greater correction in the refractive astigmatism than in the keratometric astigmatism. After surgery, it was found a small group of patients with low degrees of astigmatism that did not exist before surgery. It was called induced astigmatism, and it was higher in the case of keratometric astigmatism
%K Astigmatismo
%K cirug¨ªa ref
%K ractiva
%K cirug¨ªa
%K Astigmatism
%K refractive
%K surgery
%K surgery
%U http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S0864-21762005000100010