The Application Field Of Reading Glasses

Presbyopia is a normal physiological phenomenon, not an eye disease, nor is it something that the elderly have. After the age of 40, with the gradual fiber hardening of the lens of the human eye, the ciliary muscle is gradually paralyzed, so that the human eye can not effectively adjust the shape of the eye (axial change), only by adjusting the distance between the eye and the object seen, to see the object near the distance must be moved away to see clearly, then the eye state is called presbyopia.
Presbyopia if you want to use your vision at the original accustomed distance, you must wear reading glasses to supplement your vision, so that you can see clearly again. It is no exaggeration to say that reading glasses are the second pair of eyes after everyone enters middle age. Presbyopia is related to age. For example, presbyopia is +1.50D(or 150 degrees) at age 45, and increases to +2.00D(or 200 degrees) at age 50, whether you wear glasses or not. Presbyopia has appeared, strong support not wearing reading glasses, then the ciliary muscle exhaustion can not be adjusted, will aggravate reading difficulties, produce dizziness and many other symptoms, affecting life and work, which is very unwise. Therefore, when the reading glasses are matched, do not delay. After the growth of age, the original reading glasses are not enough, and they should be replaced in time. Therefore, reading glasses can not be worn to the end. Wearing inappropriate reading glasses for a long time will not only bring a lot of inconvenience to your life, but also accelerate the process of presbyopia.
Under normal circumstances, there are two main manifestations of early presbyopia: the first is proximity work or reading difficulties. For example, you need to hold the book far away when reading, or you need to read in a place with high light to see clearly. The second is visual fatigue. With the decline of the adjustment force, the reading demand gradually approaches the limit of the adjustment force, that is, when reading, almost all the adjustment force of the eyes must be used, which leads to the failure to use the eyes for a long time, and the symptoms of eye fatigue such as eye distension and headache are easy to occur due to excessive adjustment. The above two phenomena indicate that the eyes may begin to presbyopia. For nearsighted people, the need to take off the glasses or pull the reading material away when reading closely is also a sign of presbyopia. After presbyopia, the safest way is to wear proper reading glasses for correction.