Knowing what refractive index lenses to purchase based on one's degree solves half of the problem. Now, let's talk about whether those functional cheap eyeglasses near-me lenses meet your needs.

If you don't have any special needs, or if you are getting glasses for the first time and want to have an adaptation process, then choosing a single lens is completely fine. On the one hand, a single lens is a light zone that is easy to adapt to, and at the same time, it has no other functions and the price is relatively affordable.

In single-lens lenses, there are also two categories based on curvature. Single-lens spherical lenses generally have a refractive index of 1.50. Due to the peripheral deformation of spherical lenses, there is a greater sense of deformation when looking at things. Therefore, the current user population is not many, and it is more suitable for people with steep corneal curvature, low initial fitting degree, or long-term wearing of spherical lenses.

Single-lens non-spherical lenses are currently the mainstream lenses on eyeglass mart. Due to the design of non-spherical surfaces, the deformation effect of objects is reduced, resulting in better wearing comfort and improved visual quality, especially for people with high degrees and astigmatism.

Now, has also launched inner and outer dual non-spherical lenses, as well as more axial non-spherical designs, which can further improve visual quality and reduce the discomfort of wearing astigmatism. However, although I initially said that single lens is cheap, single-lens lenses with these technologies are still expensive.

Most mainstream lenses on the eyeglass mart are divided into functional categories. As for the film layer of the lens, there is basically no significant difference in the material and film layer of the lens nowadays. Generally, as long as you buy branded lenses, the basic film layer is also sufficient.