Although the Abbe number is an important parameter, it is not necessary to place too much emphasis on it. Many other factors affect the quality of eyeglass lenses, including materials, design, and film layers. It can only be said that the higher the Abbe number, the clearer and more comfortable discount prescription glasses will be.

The Abbe number has a certain influence on the discount eyeglasses online lens, as it determines the amount of dispersion of light passing through our lens. The larger the Abbe number, the better. Firstly, let's analyze what exactly an Abbe number is. You can understand it as both resolution and clarity.

If the term Abbe number is not easy to understand, let's change it to dispersion coefficient. The Abbe number is the reciprocal of the dispersion coefficient, and the smaller the dispersion, the higher the Abbe number.

Assuming a beam of light shines on a lens and refracts it, it will cause different angles of refraction based on the value of the Abbe number. That is to say, the narrower the colored light behind it, the better. Therefore, there is a saying that the lens is better with a larger Abbe number!

But! You must watch it, but! Don't blindly assume that a large Abbe number is good. It needs to be decided based on one's actual situation. Before choosing an Abbe number, check if your corrected visual acuity has been achieved. Otherwise, its choice is not so important.

High refractive index cheapest eyeglasses online lenses have lower Abbe numbers, so let's talk about clarity. The higher the refractive index, the greater the hardness. If scratched, it may not be clear. So you need to choose based on your mirror-changing cycle.