+ +

wavefront

Aberrations post presby-LASIK

This clinical case provides a classic example of the limitations of the Zernike series to characterize the typical deformation of the ocular wavefront after LASIK surgery of hyperopia and presbyopia (« presby-LASIK »). Although the concept of using higher order aberrations such as negative spherical aberration to increase the ocular multifocality is well accepted, there has been […]

En savoir plus

Pre- and Post-LASIK aberrations comparison

Pre- and Post- LASIK aberrations with Standardized Zernike vs LD-HD wavefront reconstruction method We present another case to highlight the difference between the Zernike and LD-HD (Low Degree/High Degree) wavefront decompositions. As we will see in this case, the presence of Higher Order Aberrations (HOAs) not only result in an artefactual alteration of the low […]

En savoir plus

Novel Polynomial Decomposition: Clinical Examples

CLINICAL EXAMPLES: TAKING OUR THEORY TO YOUR CLINICAL PRACTICE! To aid understanding of the application of a novel wavefront decomposition method and polynomials (+read the JOSA A paper), we have created further clinical examples including clinical scenarios you will come across in your practice. Current wavefront sensors (read more about wavefront sensing) express the wavefront […]

En savoir plus

Zernike polynomials

The Zernike polynomials This page will focus on the use of Zernike polynomials for describing optical wavefronts. Before focusing on the Zernike polynomials, it is important to understand the basics of wavefront sensing. In ophthalmology and visual sciences, Zernike polynomials are mainly used to analyse the wavefront error of the human eye. It is also […]

En savoir plus

Wavefront sensing

WAVEFRONT SENSING CAN MAKE SENSE ! An introduction to help you familiarize yourself with the basics of WAVEFRONT ANALYSIS Target Audience : Clinicians and Ophthalmic Practitioners INTRODUCTION Since the emergence of wavefront sensing technology, there has been a resurgence of interest in Optical Wavefront Analysis as a subset of Adaptive Optics (AO). Previously, we were […]

En savoir plus