Lenses do not exist independently, they need to be paired with eyeglasses online cheap frames to create suitable glasses for customers to wear. This involves the question of whether the diameter size can achieve the actual distance between the customer's pupils.

When fitting for farsightedness/presbyopia, it is often necessary to consider that the eyes that are close to the human eye require internal rotation, resulting in a smaller distance between the near and far pupils.

Especially for high farsightedness/presbyopia glasses, the smaller the diameter, the thinner it is. It is recommended to choose a more suitable cheap online eyeglasses frame, which can choose a smaller diameter, and the lens will be thinner and lighter.

Even if a low refractive index lens is chosen, as long as the diameter is small enough, it is still relatively thin and light. Since the lenses have already been selected, the only solution is to customize the lenses, make larger lens diameters, or do a center shift.

Is there a relationship between lens weight and degree? There must be, but the impact is not significant. The thickness of different locations with astigmatism will vary—thickness at different positions and angles.

Of course, some can still be seen in circles from the side, but when viewed from the front, they will shrink significantly. If the degree is high, there is nothing we can do about it, as there are different degrees of deformation.

The refractive index of a lens depends on the material used. When the center thickness is the same, lenses of the same degree and material have thinner edges than lenses with lower refractive indices.

We can determine the price of a lens based on its refractive index, and the higher the refractive index, the higher the price.