The selection of lenses, the relationship between refractive index and Abbe number, in fact, refractive index affects the thickness of the lens processed. At the same degree, the higher the refractive index, the thinner the lens, and vice versa, the thicker the lens. The higher the degree, the more significant the difference in thickness. If you have a high degree of nearsightedness and would like to pair it with lightweight and beautiful prescription glasses, you can consider a high refractive index. There may be slight differences in the refractive index of lenses made of different materials. If it is glasses online, detailed data can be obtained from the customer service of the purchased glasses online store.

Firstly, it is important to clarify that correction is not a treatment or cure. The role of correction in the field of refraction is to help you restore normal vision through optical products, including surgery.

At present, there is no treatment method for myopia, and all methods are correction, including surgery, which cannot solve the internal changes in the eyeball caused by myopia. So wearing glasses only help you return to a clear state from nearsightedness.

The degree of myopia increases continuously when wearing glasses, which is due to one's own development or the deepening or natural growth of myopia caused by excessive use of the eyes, especially in children at the peak of growth and development.