People are not machines, and individual differences are significant. Glass fitting is not about buying and selling frames and lenses, but rather an integrated system that includes services and cheapest eyeglasses online products. The selection radius should be expanded, and a large number of customer reviews should be carefully read.

Don't just stay at the question of which refractive index to choose based on how many degrees I have. Eyes are not machines, and everyone's situation is completely different.

Without going through system checks, making decisions about parameters, series, and brands based on fragmented online information, and sitting on one end of the network is buying glasses, not matching glasses. Eye health is very important and worth taking seriously.

Optometry is the core of the cheapest eyeglasses online optometry. Understand lenses, spherical or non-spherical. Nowadays, most of them are non-spherical eyeglasses.

Refractive index. be careful! However the higher the refractive index, the thinner the lens! However, the higher the refractive index, the more expensive the price! How to choose? When the thickness of the lens is acceptable, priority should be given to selecting those with lower refractive index.

The layer with the largest price difference for lenses. The film layer does indeed make a difference in the clarity and comfort of the lens. But the lenses come with corresponding film layers from the factory, fully meeting the basic requirements.

When choosing the cheapest eyeglasses online frame, first consider the distance between the pupils. The width of the frame should be proportional to the distance between the two pupils, ensuring that the pupils are in the center of the frame and lens when wearing the glasses, and then considering other factors such as personal face shape, frame style, color, etc.