CIMEC   24726
CENTRO DE INVESTIGACION DE METODOS COMPUTACIONALES
Unidad Ejecutora - UE
capítulos de libros
Título:
Biomechanics of Subtractive Surgery: From ALK to LASIK
Autor/es:
FABIO A GUARNIERI
Libro:
Corneal Biomechanics and Refractive Surgery
Editorial:
Springer
Referencias:
Año: 2014; p. 57 - 71
Resumen:
Myopic and hyperopic excimer laser in situ keratomileusis (LASIK) have
become widely accepted procedures. Although LASIK does not rely on
the mechanical response of the cornea to obtain the optical correction,
the creation of a flap and ablation of the exposed stromal bed must
disturb the state of stress in the tissue below the ablation zone. Little
attention appears to have been paid to the mechanical response of the
cornea to LASIK [1?3]. For low to moderate correction, the stress change
induced by the surgical procedure is probably relatively small, although,
to the best of our knowledge, it has not been quantified to date. As
interest moves to deeper ablation depths, it is increasingly important to
understand the mechanical response of the tissue to its new geometric
configuration. Clearly, as ablation depths vary from shallow to very
deep, the cornea can be expected to exhibit a corresponding range of
deformational responses. The deformational response of the cornea to
LASIK can be identified with an instantaneous component associated
with the intrinsic elasticity of the tissue and a delayed postoperative
component that may be associated with possible regression and that
derives from complex and poorly understood mechanisms.