Wavefront-Guided Laser Treatment Using a High-Resolution Aberrometer to Measure Irregular Corneas: A Pilot Study

Abstract

Wavefront-guided laser enhancements using the evaluated platform seem to be safe and effective to restore the visual function in aberrated eyes.

Wave Front–Guided Photorefractive Keratectomy Using a High-Resolution Aberrometer After Corneal Collagen Cross-Linking in Keratoconus

“…The significant visual improvement obtained in our series was due to the reduction of the spherocylindrical error and the minimization of HOAs. Specifically, the SE was reduced from a mean preoperative value of 23.22 6 1.32 D to a mean postoperative value of 20.68 6 0.64 D at the last follow-up visit, with 62% of the cases having an SE within 60.50 D. This outcome is consistent with that obtained in our previous pilot study, 12 as well as in other studies evaluating the sequential and simultaneous CXL + WFG PRK approaches in keratoconus. 17,19,28,29 In contrast, Kanellopoulos 20 found in the comparative study of sequential versus simultaneous CXL + PRK in keratoconus, more reduction in the SE refraction with the simultaneous treatment (2.50 6 1.20 vs. 3.20 6 1.40 D).…”

“…This result is consistent with that obtained in our previous pilot study in which a significant reduction in trefoil RMS was also found. 12 Likewise, Shetty and et al 34 also found a reduction in some corneal HOAs after simultaneous CXL and topography-guided PRK, the change being only statistically significant for the trefoil and spherical aberration and of less magnitude than that found in our series for ocular aberrations. Alessio et al 31 found that the total and coma-like aberrations were not decreased significantly for all pupil diameters after simultaneous CXL and topography-guided PRK in keratoconus.…”

“…These results are consistent with those reported in our previous pilot study evaluating the outcomes of WFG PRK in corneas with keratoconus with previous CXL treatment. 12 Significant visual improvements have been also reported in other series evaluating eyes with keratoconus undergoing wave front or topography-guided PRK in clinical and subclinical corneas with keratoconus with previous or simultaneous CXL. [13][14][15][16][17][18][19][20] Kanellopoulos and Binder 19 reported a case of bilateral keratoconus with 1 eye treated using a sequential approach CXL + PRK and the other eye receiving only CXL.…”

“…11 The last option introduced in the management of keratoconus has been the application of laser ablation. 12 It is a controversial issue because this correction option is based on tissue removal, and therefore it is a weakening technique. However, in forme fruste or suspect keratoconus, surface ablation has been demonstrated to be a safe technique with promising results.…”

Visual, aberrometric, photic phenomena, and patient satisfaction after myopic wavefront-guided LASIK using a high-resolution aberrometer

“…Specifically, these advances have allowed surgeons to overcome some limitations concerning the characterization of ocular aberrations and therefore to obtain improved outcomes using wavefront-guided (WFG) ablation profiles, even in the more complex cases 2,4–6. There is a variety of studies confirming the safety and efficacy of WFG laser in situ keratomileusis (LASIK) for the correction of spherocylindrical refractive errors with the latest laser platforms as well as the ability of these treatments to minimize the induction of higher order aberrations (HOAs) and reduce the level of some preexisting HOAs 1–3,5–15…”