Friends with myopia often pay more attention to the edge thickness of the lens, hoping that the thinner the better. In terms of the cheapest eyeglasses lens design, for lenses with the same refractive index, if the edge thickness is made thinner, the center thickness will also be thinner.

Compared to defocusing lenses, single-lens lenses have thicker centers and thicker edges. Why do we need to make the center thickness so thick? A large part of the reason is to consider the safety during the use of lenses.

Compared to myopic discountglasses lenses, farsighted lenses have exactly the opposite, with thicker centers and thinner edges. If it becomes thick to a certain extent, not only will it sink, but it will also increase the burden on the nose bridge.

Wearing it with high farsightedness is like a magnifying glass, making your eyes bright and lively. What is the most suitable way to pair glasses for farsightedness? To obtain lighter and thinner far-sighted lenses, there are three directions: choose a high refractive index; Reduce the diameter of the lens; and Choose a more advanced chip design.

By slightly changing the diameter of the eyeglasses online cheap lens (customized lens), a thinner appearance than conventional lenses can be achieved, and more importantly, a significant amount of cost can be saved. Of course, the above is an ideal state, and there may be limitations in practical applications.

To choose the appropriate lens diameter, in addition to prescription data such as refractive power, pupillary distance, and prism, complete assembly frame size information is also required! To achieve the best results after assembly, customized lenses will also adjust the edge thickness of the lenses separately for half frame, frameless, and full frame.