Correct selection of reading glasses for presbyopia

Correct selection of reading glasses for presbyopia

Many people gradually develop presbyopia with age, especially when they are 45 years old, the number of aging eyes is gradually increasing,   and presbyopia is also called presbyopia.

Presbyopia is a normal physiological phenomenon. Because the adjustment power of the eye is around the age of 10, and then gradually   weakens with age, and the remaining adjustment power is less around the age of 45, and the near point distance gradually increases. At this   time, it can no longer meet the needs of reading and presbyopia occurs. eye phenomenon.

Presbyopia requires appropriate reading glasses. Presbyopia is a kind of biconvex lens, which can be used to supplement the lack of eye   adjustment and achieve the purpose of treating presbyopia. So, how to choose reading glasses correctly?

Before fitting presbyopic glasses, you must first check the optometry, first determine whether you have myopia, hyperopia and astigmatism,   and then increase or decrease the diopter according to the age and degree of presbyopia. If you have myopia, subtract the degree of   presbyopia at normal age from the degree of myopia. For example, if you have 200 degrees of myopia, you are now 45 years old (the degree of presbyopia at normal age is 100 degrees). In fact, you only need to wear 100 degrees of presbyopia. Myopia lenses can see close objects   clearly. If you have hyperopia, you should add the degree of hyperopia to the degree of presbyopia at normal age. For example, if you are also 45 years old, but you have 200 degrees of hyperopia, you should actually wear 300 degrees of reading glasses. Of course, when matching   glasses, you should also increase or decrease the degree of the lens appropriately in combination with the working distance you are used to.   If the working distance is relatively short, the degree of reading glasses should be appropriately increased, otherwise, the degree of reading   glasses should be appropriately reduced. The relationship between the age of a normal person and the degree of presbyopia is roughly as   follows:

Age (years) Degree of reading glasses:

40    75

45    100

50    200

55    250

60    300

65    325

70 350

When wearing reading glasses, it is also necessary to increase or decrease the prescription of the lenses in combination with the working   distance that the patient is usually accustomed to. If the distance between the work and the eyes is close, the reading glasses should be   appropriately increased; otherwise, the reading glasses can be relatively reduced. Of course, reading glasses can only be used when looking at nearby objects, and you can't see anything clearly when looking at distant objects.

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