In UK,both sides of Spherical lens of glass are spherical or one side is spherical and the other is the plane. The surface of the Aspherical lens is determined by a number of higher order equations and the radiuses of a point on the surface is not the same.Just take a look at our best glass for UK women.
The design of UK aspheric lens of glasses make up shortcomings (aberrations)of spherical lens.The design of various radius of curvatureon are used on the convex surface of the whole lens. The part of the convex lens or concave shape is like the sphere cut down, this is the spherical lens.We sell all the cheap glasses.
And now lets talk about the UK traditional spherical lens.The number of degrees in center is less then the end of the cirle.Not only the thickness of lens, but also have distortions to see things through the lens around. The center degree of Apherical lenses is same as the number of close proximity so that the lens is thinner and more open.The edge has no arc so that the image difference is reduced to the lowest. The image is more real and more natural and we will not feel tired.Our glasses have the best sales.