Figure 5.

Preoperative and post-HRWG PRK + CXL corneal topography axial power map and polar Zernike coefficients, as recorded by iDesign software (iDesign, Abbott Medical Optics, Inc., Santa Ana, CA, USA) in one of the keratoconus™ eyes.

Notes: As evident, there is significant topographic improvement following HRWG PRK + CXL. Zernike coefficients, particularly, astigmatism, coma, and trefoil demonstrate considerable improvement. Overall, total root mean square error reduced from 0.94 preoperatively to 0.43 at postoperative 12 months.

Abbreviations: CXL, corneal cross-linking; HRWG, high-resolution wavefront-guided; PRK, photorefractive keratectomy.