Total, Corneal, and Internal Ocular Optical Aberrations in Patients With Keratoconus

Abstract

A compensatory effect of increased anterior corneal aberrations by internal aberrations in keratoconic eyes was present for some aberrations. The origin of this compensation and the optical mechanism behind it requires further study.

The change in internal aberrations following myopic corneal laser refractive surgery

“…For this compensation to occur following LASIK, it is more likely to exist for spherical aberration as opposed to the changes which were found to also occur with Z 4 6 , as sixth radial order aberrations are generally of much lower magnitude than lower radial order aberrations. Similar compensatory effects have also been suggested to occur in keratoconic eyes [46]. Findings may also be due to measurement inaccuracies or errors with the OPD-Scan [47].…”

Higher-order aberrations after corneal collagen crosslinking for keratoconus and corneal ectasia

“…2,3,19,20 Collagen crosslinking, although developed primarily to mitigate progression of ectatic corneal processes, has also been found to improve visual acuity and corneal topography characteristics in some patients with keratoconus and ectasia. [9][10][11][12][13]18,21 These effects are likely secondary to changes in the cornea's optical architecture, a result of the direct CXL effects and the consequent woundhealing processes.…”

Accelerated Corneal Crosslinking Results with Respect to Age Groups

“…5,27 It is known that in keratoconus, HOAs increase and this situation contributes to the decrease in visual acuity. 30 In our study, we determined decreases in coma, HO-RMS and total RMS in both groups, as well as a decrease in SA in Group 2 in the 6 th month following the accelerated corneal CXL. This data substantiates other similar studies.…”