When you are young, you are short-sighted. When you are old, you won’t be presbyopia?

Abstract: people with hyperopia can’t see near clearly without glasses, so they will have old flowers earlier. Because hyperopia is also through a convex lens (positive sign) correction. Therefore, for people with hyperopia, the degree of reading glasses is the degree of hyperopia plus the degree of presbyopia. They all say that God is fair. No matter whether the eyes are good or bad, people always need a pair of eyes in their life. If they are short-sighted when young, they don’t need to wear reading glasses when they are old; if they have good eyesight when young, they need to wear reading glasses when they are old. Is that really the case ? It’s not exactly true, but it makes sense., Let’s see what’s wrong with presbyopia first?, Old flower is actually a physiological phenomenon, which is mainly manifested in being unable to see close. Many people may find that they can’t see the words on the mobile phone screen, so they need to take the mobile phone away., This is because when light enters the human eye, it needs the cornea and lens to focus. With the growth of age, the lens gradually hardens and becomes less elastic, and the ability to control the ciliary muscle of the lens will become weaker, which makes the eye’s adjustment ability drop when looking close, so that it can’t focus clearly when looking close. You need to wear presbyopic glasses to help you see clearly., Old flowers usually appear after the age of 40. With the increase of age, the more obvious the symptoms are, and the degree of flower glasses required will gradually increase., Will the degree of myopia change with age?, In addition to some patients with pathological high myopia, the degree of myopia will increase uncontrollably. Most patients with myopia will stabilize after the age of 25.,

all say that God is fair. No matter whether the eyes are good or bad, people always need a pair of eyes in their life. When you are young, you are short-sighted and wear glasses. When you are old, you don’t have to wear fancy glasses; When you are young, you have good eyesight. When you are old, you need to wear reading glasses.

really? It’s not exactly true, but it makes sense.

let’s see what’s going on with presbyopia first?

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old flowers are actually a physiological phenomenon, which is mainly manifested in unclear sight. Many people may find that they can’t see the words on the mobile phone screen, so they need to take the mobile phone away.

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this is because when light enters the human eye, it needs the cornea and lens to focus. With the growth of age, the lens gradually hardens and becomes less elastic, and the ability to control the ciliary muscle of the lens will also become weaker. As a result, the adjustment ability of the eye decreases when looking close, so that it can not focus clearly when looking close. You need to wear presbyopic glasses to help you see clearly.

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old flowers generally appear after the age of 40. With the increase of age, the more obvious the symptoms are, and the number of flower glasses required will gradually increase.

will the degree of myopia change with age?

in addition to some patients with pathological high myopia, the degree of myopia will increase uncontrollably. Most patients with myopia will stabilize after the age of 25.

however, with age, especially when the lens begins to age and cataract occurs, the degree of myopia of many people will decrease, but the degree of astigmatism may increase. At this time, the old flower will become obvious.

will myopic people have old flowers?

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are basically the same, because the old flower is a physiological aging phenomenon, and will not be different because of myopia, but there are individual differences, and the age of the old flower is different. And due to the different degrees of their own eyes, the degree of presbyopia glasses required is also different.

on average, regardless of the original degree of their own eyes, the degree of old flowers at different ages is roughly as follows:

■ about 45 years old, about 150 degrees

■ about 50 years old, about 200 degrees

■ about 60 years old, about 300 degrees

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. Old flowers can’t be seen clearly, Therefore, using a convex lens to correct, the degree of presbyopic glasses is the degree of glasses looking far plus the degree of presbyopic glasses.

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farsighted people can’t see close without glasses, so they will have old flowers earlier. Since hyperopia is also corrected by convex lens (indicated by positive sign), the degree of presbyopia glasses for hyperopia people is the degree of hyperopia plus presbyopia. For example, if presbyopia is + 200 degrees, then presbyopia glasses with + 500 degrees are required.

And myopic people can’t see far clearly, but there’s no problem seeing near, so it’s relatively late to see old flowers. Myopia is corrected by concave lens (negative sign). For example, if you used to wear glasses with a distance of – 200 degrees, but now the old flower is + 200 degrees, you only need to remove the glasses when you look close, so you don’t need to wear flower glasses, because the degree of flower glasses is 0. However, if the degree of myopia is large, such as myopia of – 500 degrees and old flower + 200 degrees, you also need to wear flower glasses with a degree of – 300.

therefore, what we said at the beginning is that those who have good eyesight when they are young and need to wear fancy glasses when they are old are basically correct; In fact, it is not quite correct to wear myopia glasses when you are young and not to wear fancy glasses when you are old, because most people can’t completely offset the degree of myopia and the degree of old flowers, so you need to wear fancy glasses when you are old.