The reading glasses are usually used for people who are over 40 with presbyopia. When you select the reading glasses for your mother, you had better pay attention to the following factors. Firstly, you should clearly know the strength of your mother's prescription. So you had better take your mother to take an exam by the eye doctor. And you should also consider your mother's face shape, usually we choose the reading glasses shape that is opposite to our face shape. For example, if your mother has a round face, you don't choose a round shape reading glasses. And her job type is also considered as criteria, because the frame of the reading glasses can be designed based on different requirements, such as rimless, full-framed.