Presbyopia is generally referred to as presbyopia, which is a normal physiological phenomenon commonly found in people over 40 years of age. However, there is no clinical term for how old the eyes start to presbyopia, and there is no fixed age for the occurrence of presbyopia. Presbyopia is also known as presbyopia, which is mainly due to the patient’s aging, lens hardening and elasticity, resulting in physiological weakening of the eye adjustment function. This phenomenon is commonly seen in people over 40 years of age, but there is no such thing as how old the eyes begin to presbyopia, and the age at which presbyopia occurs in the elderly is not fixed. Although the occurrence of presbyopia has a greater relationship with the age of the elderly, but it is not only related to age, the usual habits of eye use, personal physical quality, living environment and other factors, will have an impact on the occurrence of presbyopia. If the patient usually has a long time, close to the eyes and other behaviors, or personal physical quality is poor, it will also lead to presbyopia early occurrence. How old the eyes begin to presbyopia and individual habits also have a greater relationship, it is recommended that people who do not have presbyopia usually maintain good eye habits.