Some customers said how can I know how much corneal astigmatism I have? How do you know if the corneal curvature is steep? In fact, it is not difficult to find that the computer optometers in all stores now have corneal curvature.

(Curvature) Corneal astigmatism means that the peripheral difference of corneal astigmatism is not very big. Eye care professionals will measure it when they perform optometry.

As we all know, a beam of light refracted through a Dispersive prism will appear colorful. When the light passes through the glasses, it will produce an uncomfortable sense of aberration. Aspherical single light lenses refer to those specially arranged radius of curvature of the lens surface from the center to the edge in order to eliminate and reduce the edge aberration of the lens and make the vision more uniform and clear.

 At the same time, the glasses are lighter Thinner lenses (note: there is no mention of being flatter) for farsightedness lenses. From the center of the lens to the periphery, the curvature radius gradually increases, and the surface of the lens gradually flattens. Myopic lenses are the opposite.

The aspherical lens is suitable for people: people with flat corneas, people with large corneal astigmatism, people with large diopter, people who want thin glasses, people who are sensitive to aberrations, people who want to reduce deformation, and people who want comfortable glasses.