Many people gradually develop presbyopia as they get older, especially when they are 45 years old. The age of aging eyes is increasing. Presbyopia is also called presbyopia.
Presbyopia is a normal physiological phenomenon. Because the adjustment power of the eye is about 10 years old, and then gradually weakens with age, there is less remaining adjustment power around 45 years old, and the near distance gradually increases. At this time, presbyopia can no longer meet the needs of reading. Eye phenomenon.
Presbyopia requires a suitable reading glasses. Presbyopia is a kind of lenticular lens, which can be used to supplement the deficiency of the eye's adjusting power, and achieve the purpose of treating presbyopia. So, how to choose reading glasses correctly?
Before fitting a reading glasses, you must first have an optometry, first determine whether there is nearsightedness, farsightedness, and astigmatism, and then increase or decrease the diopter according to the age and the degree of presbyopia. For those who have myopia, the degree of presbyopia of normal age is subtracted from the degree of myopia. For example, the myopia of 200 degrees is now 45 years old. Myopia lenses can see objects nearby. For those who have farsightedness, the degree of hyperopia should be added to the presbyopia of normal age, for example: the same as 45 years old, and the original 200 degree hyperopia should actually wear a 300 degree reading glasses. Of course, when pairing with a spectacle lens, it is necessary to appropriately increase or decrease the power of the lens in combination with the usual working distance. If the working distance is short, the reading power of reading glasses should be increased appropriately; otherwise, the reading power of reading glasses should be appropriately reduced.
When matching the reading glasses, the patient's usual working distance should be combined to appropriately increase or decrease the power of the lens. If the distance between the work and the eye is close, the reading power of the reading glasses should be appropriately increased; otherwise, the reading power of the reading glasses can be relatively reduced. Of course, wearing reading glasses can only be used when looking at nearby objects, and you can't see anything when looking at distant objects.