The Basic Classification Of Reading Glasses

There are three main types of reading glasses on the market, namely single lens, double lens and progressive multifocal lens. Single lens can only be used to see close, you need to remove the glasses when looking far. Bifocals mean that the upper half of the lens is used to see far, the lower half of the lens is used to see close, but this reading glasses have a jumping phenomenon, and the shape is not beautiful. Progressive multifocal mirrors can meet the needs of different distances from far to near, and the appearance is also very good, and the popularity rate has increased year by year in 2019, and the first generation has a longer adaptation time.