Presbyopia, also called presbyopia, is a degenerative disease of the eye, mostly seen in middle-aged and elderly people. The main principle is that as we age, the lens gradually hardens and the function of the ciliary muscle gradually decreases, which causes a gradual decrease in the eye’s ability to adjust, making it difficult to read and work at close range. To find out the exact degree of presbyopia, you need to have an optometry. The degree of presbyopia consists of two parts, namely the degree of optometry plus the physiological degree. Roughly speaking, the physiological prescription is about 100 degrees at age 45, and increases by about 50 degrees for every 5 years after that. If a 45-year-old person has an optometry of 100 degrees, the actual degree of presbyopia should be 100+100=200 degrees. Since presbyopia is due to degenerative changes in the eye, it is still not treatable with medication until now. Patients in the early stages of presbyopia are advised to read when there is sufficient light. For people who use computers for a long time, they should take a break once every forty minutes to move their eyes away from the screen or close their eyes to allow the ciliary muscles to rest properly. Diet needs to be nutritionally balanced, and foods rich in lutein and vitamin A, such as carrots, egg yolks, and liver, can be consumed for health care and symptom mitigation in early presbyopia. Finally, we remind presbyopic patients not to buy presbyopic glasses from roadside stalls on their own, but to go to the hospital for a detailed vision and optometry examination, and to make appropriate adjustments for their personal conditions and wear the right glasses to see more clearly. If you buy presbyopic glasses at a roadside stall, you may have the problem of inadequate prescription, which will instead trigger adverse reactions such as dizziness and double vision in patients.