Time course of Q value after myopic laser-assisted in situ keratomileusis / 中国医学科学杂志(英文版)
Chinese Medical Sciences Journal
;
(4): 141-145, 2011.
Artículo
en Inglés
| WPRIM
| ID: wpr-299396
ABSTRACT
<p><b>OBJECTIVE</b>To assess the time course of Q value after myopic laser-assisted in situ keratomileusis (LASIK) and preliminarily evaluate the determinants of the difference of Q value between before and after LASIK.</p><p><b>METHODS</b>We performed a retrospective, longitudinal investigation on patients undergoing wavefront optimized LASIK therapy for emmetropization. A total of 418 eyes from 222 cases were examined preoperatively, and partly followed up at one week (172 eyes), one month (134 eyes) and three months (51 eyes) after surgery. The horizontal, vertical and total Q values of cornea were calculated from eccentricity measured at the central 6-mm corneal zones respectively. Potential determinants of the change of Q value were analyzed using multiple linear regressions.</p><p><b>RESULTS</b>The mean Q value was -0.17 +/- 0.13 preoperatively, and 0.99 +/- 0.70, 0.97 +/- 0.66, and 0.86 +/- 0.41 one week, one and three months postoperatively, respectively. One way analysis of variance (ANOVA) demonstrated significant differences between measurements made before surgery and at all postoperative times (at one week, one and three months; all P<0.0001, Bonferroni post hoc), but no significant differences were found among postoperative groups. Significant differences of Q values between horizontal and vertical meridians were found before surgery and at all postoperative times (all P<0.0001). Multiple regression analysis revealed that change of Q value significantly correlated with manifest refraction spherical equivalent (r=0.116, P<0.0001) and axial length (r=0.264, P<0.0001).</p><p><b>CONCLUSIONS</b>Over the study period, the primary changes in Q value occur within 1 week after surgery, and then become slightly decreased and nearly stable. Manifest refraction spherical equivalent and axial length play a significant role in the change of postoperative Q value.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Cirugía General
/
Estudios Retrospectivos
/
Resultado del Tratamiento
/
Córnea
/
Queratomileusis por Láser In Situ
/
Métodos
/
Miopía
Tipo de estudio:
Estudio observacional
Límite:
Adolescente
/
Adulto
/
Femenino
/
Humanos
/
Masculino
Idioma:
Inglés
Revista:
Chinese Medical Sciences Journal
Año:
2011
Tipo del documento:
Artículo
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