Will myopia lead to presbyopia?
I have heard many myopic patients say that they will not have presbyopia after they become myopic. In fact, this statement is wrong. Myopic patients will also suffer from presbyopia. Myopia means that you cannot see clearly at a distance, and you need to wear myopic glasses (a concave lens) to see clearly. When you reach the age of presbyopia, you need to reduce the degree of the original concave lens (equivalent to adding a convex lens) to see close objects, or even take off your myopic glasses to see clearly. For example, if you originally had 250 degrees of myopia, and you currently have 200 degrees of presbyopia, you only need a 50-degree concave lens to see close objects. At this time, you can see close objects clearly without wearing glasses (because it is equivalent to only 50 degrees of myopia).
In fact, you still have myopia and presbyopia, but it just gives people an illusion that you can read books and newspapers without wearing reading glasses.
The degree of dizziness changes with age
Dizziness is irreversible as people age, and the better the vision, the more obvious the symptoms of dizziness. If you have symptoms of dizziness such as headaches and eye pain, you should go to a professional store to get reading glasses immediately. Wearing reading glasses (a convex lens) is the simplest and necessary method. Since the degree of presbyopia changes with age, the degree of reading glasses will also increase accordingly.
Two ways to wear reading glasses
The first is to add 1/3 of the adjustment force to the degree of glasses that can see close objects clearly as a reserve;
The second is to use the lowest degree of glasses that can see close objects clearly. The practice of many elderly people has proved that the latter is better.
Principles of wearing reading glasses
If you can still see close objects, try to wear them later; if you can see at a low degree, do not wear depth glasses. Generally, people with presbyopia wear 75-100 degrees of reading glasses, and then increase 50 degrees every year until they are 70 years old. You should have your eyes tested before wearing reading glasses, so as not to wear too high a degree of reading glasses at first, which will cause the ciliary muscle to degenerate and damage your vision. Therefore, people with presbyopia should choose to wear suitable reading glasses, which is beneficial to eye health and convenient for life and work.
Hyperopia and presbyopia are not the same thing
Hyperopia is a refractive error, which is mainly manifested by unclear vision at a distance, even more unclear vision at near distance, and visual fatigue. Hyperopia occurs from childhood. Presbyopia is a natural physiological aging phenomenon. As the adjustment power decreases, it will occur from around 40 years old, regardless of whether one has myopia or hyperopia. It manifests as putting the reading material farther away to see clearly, and at a certain time, a positive lens is needed to help see clearly.
Taking off reading glasses is not "rejuvenation"
An elderly person has worn reading glasses for more than ten years. Recently, he suddenly can do needlework without glasses. People think it is "rejuvenation".
The structure of the human eye is very similar to a camera. It has some "adjustment devices", including the intraocular lens and ciliary muscle. When looking at close objects, the ciliary muscle contracts and the lens becomes convex, so that the image of the object falls exactly on the retina, and things can be seen clearly. If there is something wrong with the "adjustment device" of the eyes, myopia, hyperopia, presbyopia, etc. will occur, and presbyopia is a normal physiological phenomenon of the human body.