For the general population with low alcohol content, the range of choices and overall cost-effectiveness are very high. On the one hand, the discountglasses degree is low, and the lenses are not very thick. Both the choice of frame and the price of lenses are the lowest in the same range.

So, it can be said that people with low alcohol content can choose the starting price of any product, really spending the lowest money and enjoying the best service.

For people with high refractive index, we not only need to consider whether the size of the frame will differ too much from the pupil distance, resulting in a thicker edge of the lens, but also need to compare the thickness of lenses with different refractive indices.

If you want to purchase a multifunctional lens, people with high prescriptions may even need to pay a price to achieve the same functionality as those with low prescriptions.

So many people say that it costs more to wear a pair of eyeglasses online, which is certainly related to the product you choose, but it is likely that your prescription is already very high.

Although the optical performance of the lens is very good, it does not have a special thickness advantage in terms of height lenses. At the same time, due to its heavier weight and susceptibility to breakage, its safety performance is relatively low. Therefore, it is not recommended for nonspecial needs groups to purchase, mainly because the price is not cheap.

Different eyeglasses online cheap refractive indices have different materials, transmittance, and Abbe number, so it's not that the higher the refractive index, the higher the Abbe number. In terms of Abbe number, 1.50 is the highest, followed by 1.60, and 1.71 ranks third. From a comprehensive cost performance perspective, if your refractive index is within the relative coverage range, then prioritize choosing lenses with these three refractive indices.