Comparison of the optical quality vision between real post-LASIK myopic laser surgery and the simulated implantation of a phakic IOL in low myopia

Abstract

A phakic intraocular lens (PIOL) of − 4.5 D was characterized from its wavefront aberration profile. A preclinical study was conducted using pre- and post-surgery data from four patients that had undergone myopic laser refractive surgery. All these patients would have needed a PIOL of − 4.5 D. Pre-surgery data were used to simulate the effect of a PIOL implantation. Post myopic refractive surgery data were used to calculate the post-LASIK eye model. Modulation transfer function (MTF), point spread function (PSF) and simulation of optotypes vision were obtained and compared. The PIOL did not worsen the optical quality of the eyes evaluated. High order Aberrations were always higher in the post-LASIK eye model. Optics quality trended to be better in PIOL implantation than post-LASIK surgery as pupil size increased.

Numerical Analysis of the Effect of Decentered Refractive Segmented Extended Depth of Focus (EDoF) Intraocular Lenses on Predicted Visual Outcomes

“…In this work, we have adhered to the principle suggested by Atchison and Thibos that "the best model (eye) is the simplest fit for the task" [29]. Therefore, while the results presented in this study serve as a good starting point for understanding the effect of decentering in a lens without symmetry with respect to the optical axis, more sophisticated eye models, such as the Liou-Brennan model eye [30], which considers the kappa angle, or other model eyes with realistic corneal biometric data after refractive surgery [31,32], will provide complementary information about the potential behavior of this type of lenses in real eyes. Additionally, the assessment of other variables during IOL implantation, such as tilt, oblique decentrations, and segment orientation, will be useful in predicting clinical outcomes.…”