Since you have chosen high-end lenses, you must not be careless in optometry and frame design to fully utilize the advantages of good discountglasses lenses.

Moderate to low myopia, with little difference in degree between the two eyes, mild astigmatism, and no other issues. In the case of professional fitting, choosing regular lenses can also meet basic visual needs.

The condition of the eyes is complex, such as very high degrees, large differences in degree between the two eyes, severe astigmatism, strabismus, etc. Only good lenses can carry your prescription and achieve good corrective effects.

Visual conditions like this rely heavily on glasses, so I sincerely recommend adding some budget and buying good lenses. Moreover, it is important to pay more attention to optometry and choose the best place to buy eyeglasses, as the quality of these types of glasses depends heavily on the matching technology.

The thinner the lens, the better. It should be selected comprehensively from all aspects. When choosing lenses, the higher the refractive index, the better, the thinner the lenses, and they are lightweight and aesthetically pleasing to wear. Reference for lens thickness of the same degree at different refractive indices.

However, for every higher refractive index, the price will increase exponentially, with some brands offering the lowest and highest refractive indices.

In addition, the higher the refractive index of the lens, the lower the Abbe number (dispersion coefficient), resulting in a decrease in visual quality.

So, a higher refractive index is not necessarily better, and other factors such as eyeglass online lens design, lens weight, lens thickness, frame size, and visual effects need to be considered comprehensively.

Some film layers are plated on the lens, some of which can extend the service life of the lens, but most of them are actually very basic functions, not the reason why the lens can be sold particularly expensive.