1, the oxygen permeability of lenses, MCT national standard is above 90, and imported ones are generally above 120.

2. The service life of the lens is about one year in China, and it can be worn for more than three years in importing countries.

3, optical center fitting technology, generally fitting data, the more accurate the better.

Let's just say that each has its own advantages. I wear Wilma plastic mirror, I hope it can help you.