Presbyopia is a normal physiological phenomenon, not an eye disease, nor does it exist in the elderly. After the age of 40, as the lens of the human eye gradually becomes fibrotic and the ciliary muscle becomes paralyzed, the eye cannot effectively adjust the shape of the eyeball (axial changes). It can only be seen by adjusting the distance between the eye and the object being viewed. When looking at objects closer, it is necessary to move away to see them clearly. At this time, the eye state is called presbyopia.
Presbyopia requires wearing reading glasses for vision supplementation in order to maintain a clear and close range in order to use vision at the usual distance. It is not an exaggeration to say that reading glasses are the second pair of eyes for everyone entering middle age. The degree of presbyopia is related to age. For example, at the age of 45, presbyopia is+1.50D (150 degrees), and by the age of 50, regardless of whether you wear glasses or not, presbyopia will increase to+2.00D (200 degrees). Presbyopia has already appeared. If you try to hold on without wearing reading glasses, the exhaustion of the ciliary muscles cannot be regulated, which will inevitably worsen reading difficulties, cause dizziness, eye swelling and other symptoms, and affect your life and work. This is very unwise. So, presbyopia glasses should be paired as needed without delay. As you age, the reading glasses you originally wore may not have enough power, so you need to replace them in a timely manner. Therefore, reading glasses cannot be worn all at once. Wearing inappropriate reading glasses for a long time not only brings a lot of inconvenience to one's life, but also accelerates the process of eye aging.
In general, there are two main manifestations of early presbyopia: the first is difficulty working up close or reading. For example, when reading, one needs to hold the book far away or read in a place with strong light to see it clearly. The second is visual fatigue. As the regulatory power decreases, the reading demand gradually approaches the limit of regulatory power, which means that almost all the regulatory power of the eyes needs to be used during reading, which leads to the inability to use the eyes for a long time. At the same time, excessive regulation can easily cause visual fatigue symptoms such as eye bloating and headache. If the above two phenomena occur, it indicates that the eyes may be starting to age. For people with myopia, it is also a sign of presbyopia to remove glasses or pull the reading material away when reading at close range. The safest way after experiencing presbyopia is to wear appropriate reading glasses for correction.
