Regardless of the brand of shaped lenses you choose, it is important to understand that the effect of using shaped lenses to change the curvature of the cornea and thus reduce myopia is temporary and that the cornea should return to its original shape after the wearer has stopped wearing the lenses for a period of time. The most effective way to control the development of myopia is to wear keratomileusis. So what exactly are keratoplasty lenses? Please understand keratomileusis correctly. It is a type of hard contact lens worn at night while sleeping. By wearing it at night, patients can achieve the effect of not having to wear any glasses during the day, and in general, their daytime naked eye vision can be restored to more than 0.8 after removing the lens. So how do keratoplasty lenses control myopia? Keratomileusis is a mechanical compression and massage of the cornea through the central basal arc area. Under the action of the central positive pressure and the peripheral negative pressure, the corneal epithelial tissue shape gradually changes and redistributes according to the design shape of the keratomileusis lens to achieve corneal reshaping, thus effectively reducing the refractive power of myopic patients.