Simply understand the Abbe number of discountglasses, which refers to the refractive index of different light rays, such as blue, yellow, and red, in a certain material. Then, perform a formula operation to obtain the Abbe number. So theoretically, the same material will have the same Abbe number.

The higher the refractive index, the more expensive the price, the thinner the thickness, and the larger/smaller the Abbe number. So you might think, does the lens exhibit a linear pattern? The higher the refractive index, the more expensive the price, and the thinner the thickness. In theory, the Abbe number should be larger or smaller?

But in fact, it's not the case. Generally speaking, the higher the Abbe number, the clearer the field of view, and the less obvious your dispersion, which means that your visual quality will be better. Simply put, if eyeglasses online are more expensive and thinner, but their Abbe number decreases, it would be a bit of a loss.

In summary, it should be noted that there is no linear correlation between the Abbe number and the refractive index, which means that the higher the Abbe number, the higher the refractive index.

The Abbe number is only related to the material of the object and not directly related to the refractive index. The reasons behind material characteristics, cost, and quality considerations are quite easy to understand. Different thinness discount prescription glasses may be suitable for different materials, and it is also related to cost considerations and quality considerations.