The core concept of purchasing discount eyeglasses online: What do I wear these glasses for? More clear? Thinner? Harder? More clean? More protective? More anti-fog? More comfortable? More realistic? More sturdy? What other features are there?

Of course, the foundation is still a suitable degree. After selecting the appropriate frame and understanding your own needs, inform the previous brand you used, understand the characteristics of your previous lenses, and remove the less-needed performance listed above, which is the performance that your previous lenses already have.

Choose other performance requirements and find corresponding posts cheapest eyeglasses online in advance to understand which brands and products have their best performance. Finally, list each product.

Because the remaining products already have the previous lens function and have been optimized in other performance aspects, you can choose according to your budget. This way, you can choose a satisfactory pair of cheap eyeglasses near me lenses without spending extra money.

From the perspective of lens material, the refractive index of lenses varies depending on the material used. Generally speaking, the membrane layer is divided into three layers: hardening film, anti-reflection film, waterproof or anti-fouling film.

These three film layers will all affect the quality of the product. The quality of the coating can be observed with the naked eye, mainly from the reflection of the film layer, the difference in film color, and the surface quality (whether there are obvious spot and line defects). If you touch the lens with your hand, the smoothness is better, indicating better waterproof performance.

From the perspective of luminosity, the smaller the degree difference between lenses of the same luminosity, the more stable the photometric quality of the product.