We know that when light passes through the optical system of the eye, its image on the retina does not accurately reproduce the original shape of the object, a phenomenon called aberration. In our refractive system, there are not only low-order aberrations, which are commonly referred to as myopia, hyperopia, astigmatism and presbyopia, but also various higher-order aberrations, such as spherical aberrations. There are also various higher-order aberrations, such as spherical aberration, coma, and so on. The different higher order aberrations affect the quality of our vision to varying degrees. Optical lenses and general LASIK surgery can only correct the lower order aberrations such as myopia, hyperopia and astigmatism, but not the higher order aberrations. If we perform wavefront aberration-guided “individualized” myopic laser surgery, we can not only effectively correct the refractive error and restore normal vision, but also target and remove the higher-order aberrations that hinder the recovery of vision and affect the quality of vision. It also removes the higher-order aberrations at all levels that impede vision recovery and affect visual quality, resulting in clearer vision and better visual quality after surgery. VISX Wavescan’s wavefront aberration technology is truly “individualized” for myopia surgery. The aberration measurements are visualized in low- and high-order aberrations, providing valuable information for preoperative diagnosis, prediction, postoperative visual acuity evaluation, and quality comparison. These wavefront aberration measurements are aggregated with the information from the general pre-surgical myopia tests and transferred to the excimer laser system via USB flash drive to guide the “individualized” scanning of the excimer laser. The wavefront aberration-guided excimer laser scan can reduce the major factors that lead to increased postoperative higher-order aberrations, such as irregular and uneven corneal cutting surfaces, too small and too deep cutting surfaces, and too large cutting slopes, and bring the “individualized” laser cutting technology to a whole new level.