PURPOSE
To study the limits to a perfect ideal customized wavefront correction due to the change of aberrations during accommodation.
METHODS
We measured the dynamic changes of ocular aberrations during accommodation in normal eyes with a real-time Hartmann-Shack wavefront sensor. Those results were used in computer simulations to predict the benefit of a perfect customized correction.
RESULTS
Due to the continuous changes of the aberrations over time, an ideal perfect static correction will not provide stable aberration-free optics. For example, when the eye accommodates to near objects, due to the changing aberrations, the eye will become aberrated again. An alternative correction using the aberration pattern for a slightly accommodated condition could provide a bettercorrection in a larger accommodative range, although at the cost of non-perfect correction for far vision.
CONCLUSIONS
Due to the dynamic nature of ocular optics, a static perfect correction, for instance performed in customized refractive surgery, would not remain perfect for every condition occurring during normal accommodation. [J Refract Surg 2002;18:S563-S566]
AUTHORS
From the Laboratorio de Optica, Departamento de Física, Universidad de Murcia, Murcia, Spain.
The authors have no proprietary interest in the materials presented herein.
This work was supported by MCyT, Spain, and Pharmacia, Groningen, The Netherlands.
Presented at the 3rd International Congress of Wavefront Sensing and Aberration-free Refractive Correction, February 15-17, 2002, Interlaken, Switzerland.
Correspondence: Pablo Artal, PhD, Campus de Espinardo (Edificio C), 30071 Murcia, Spain. Tel: 34.96.8367224; Fax: 34.96.8367667; E-mail: pablo@um.es
