Reading glasses are mainly to meet the needs of people with presbyopia. Presbyopia is a normal physiological phenomenon, not an eye disease, nor is it unique to the elderly. After the age of 40, as the lens of the human eye gradually hardens, the ciliary muscle gradually becomes paralyzed, so that the human eye cannot effectively adjust the shape of the eyeball (axial change). It can only look at the close distance by adjusting the distance between the eye and the object. The object must be moved far to see clearly, and the eye condition at this time is called presbyopia. 

If you want presbyopia to use your vision at the distance you are accustomed to, you must wear reading glasses to supplement your vision, so that your near vision can be regained. It is no exaggeration to say that reading glasses are everyone's second pair of eyes after entering middle age. The use of reading glasses plays an indispensable role in improving people's quality of life.