What is a higher-order aspheric surface?

Spherical aspheric surface generally refers to aspheric lens. An aspherical mirror is a lens whose surface is not spherical or cylindrical. In photography, a lens containing an aspherical optical element. The surface curvature of aspheric lens is different from that of ordinary spherical lens. In order to pursue the thinness of the lens, it is necessary to change the curved surface of the lens. In the past, spherical design increased aberration and deformation, resulting in unclear images, distorted vision and narrow field of vision. Now the aspheric design corrects the image, solves the problem of visual distortion, and makes the lens lighter, thinner and flatter. But also maintains excellent impact resistance, so that the wearer can use it safely.

The third generation aspheric-high-order aspheric intraocular lens adopts the most advanced hydrophobic acrylate material in the world, which has good biocompatibility and can reduce the recurrence rate of cataract. At the same time, the patented high kyphosis design enhances the stability of the lens in the eye, improves the attachment speed with the posterior capsule, and further reduces the recurrence rate of cataract. This kind of lens has negative spherical aberration, which compensates most of the positive spherical aberration of cornea while retaining part of the positive spherical aberration, which can not only maintain good visual quality but also avoid narrowing the adjustment range. Patented high-order aspheric design can correct more types of high-order aberrations, and excellent visual quality can be obtained regardless of the eccentricity and inclination of intraocular lens.