The aging of the population has become a common phenomenon in the world. Nowadays, the health problems of the elderly are taken seriously by everyone. Among them, the vision health problems of the elderly also urgently need everyone’s attention and concern. Many people think that presbyopia just can’t see the nearby words clearly, so just buy a pair of presbyopic glasses. In fact, the choice of reading glasses is really not so “random”. It is really important to carefully choose a pair of reading glasses that suits you.
How To Choose A Pair Of Reading Glasses
1.SINGLE VISION
It is the most commonly used way to correct presbyopia. Generally, on the basis of seeing clearly in the distance, a certain amount of positive mirror power is added, so that seeing clearly in the distance becomes clear in the near.
Advantages: Comfortable, consistent lens luminosity within the field of vision, easy to adapt; economical and affordable.
Disadvantages: For some people who need to wear glasses to see far away, the operation is more cumbersome. For example, the elderly with medium to high myopia usually need to wear a pair of glasses with high myopia when walking and watching TV; if they read books or mobile phones, they need to change them. Wearing a pair of presbyopic glasses, taking them on and off, the operation is relatively cumbersome. For such a situation, is there a pair of glasses that can solve the problem of seeing far and near at the same time? Yes, bifocals.
2. Bifocals
It refers to the processing of two different refractive powers on the same glasses to become a spectacle lens with two correction areas at the same time.
Advantages: Convenient, the upper half of the lens is the far vision area, and the lower half is the near vision area. One pair of glasses solves the problem of seeing far and near, and avoids taking off and wearing two pairs of glasses back and forth.
Disadvantages: For the elderly with high degrees of presbyopia, objects in the middle distance may still be unclear; The lower prism effect makes the object seem to “jump” to the upper position.
Compared with single vision lens, bifocal lens can see both far and near, but it is a bit helpless for objects in the middle distance, so is there any glasses that can see far, middle and near, and can see clearly at every distance? Yes, Progressive glasses.
3. Progressive glasses
It refers to the gradual change of countless additional mirrors from top to bottom on a piece of glasses, providing the wearer with continuous and clear vision from far to near, and there is no special kind of glasses in terms of lens appearance.
Advantages: Convenient, the top of the lens is the far vision area, and the bottom is the near vision area. There is a long and narrow gradient area connecting the two, allowing you to see objects at intermediate distances. The two sides of the gradient area are peripheral areas. A pair of glasses simultaneously solves the visual needs of far, middle and near distances, achieving “stepless speed change”.
Disadvantages: Compared with single vision mirrors, it takes longer to learn and adapt.
So, is it “once and for all” to choose a suitable pair of reading glasses?
Nor is it. The degree of presbyopia will continue to increase with age, generally increasing at a rate of 50 degrees every 5 years. Studies have found that for people without any diopter, the degree of presbyopia at the age of 45 is usually 100 degrees, and it increases to 200 degrees at the age of 55. At the age of 60, the degree will increase to 250 degrees to 300 degrees. The degree of presbyopia generally does not deepen. But for the specific situation, it is recommended to go to the eye hospital for medical optometry before ordering glasses
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Post time: Jul-28-2023