How much is the glasses lower than the actual degree?

How much glasses are lower than the actual degree depends on the actual situation. Generally speaking, the degree of glasses is appropriate. In other words, match as many degrees as needed. However, if you wear glasses for the first time, it will not be put in place at one time, because just wearing glasses will cause discomfort, so the degree will be lower. It is advisable not to faint. There is no fixed value. If you are physically adaptable, it will drop 100~200 degrees. If you don't adapt, it will be more than 400 degrees lower. Later, when you get used to your body, you will gradually improve your degree.