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Wenzhou Wanrun Glasses Tell You If Myopic People Can Get Presbyopia

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Many people believe that people with myopia will not have presbyopia when they are old. Is this view correct? Myopia is presbyopia! Many people think that "myopic people will not presbyopia when they are old" because they do not understand the reasons for myopia and presbyopia. The principle is that myopia is a kind of ametropia. When is refraction error? Let Wenzhou Wanrun Glasses Company take you to have a look!

When the eyes are relaxed, the external parallel light enters the eyes and its focus falls on the retina to form a clear image, which is called emmetropia; If the focus cannot fall on the retina, it is called emmetropia, that is, ametropia. Myopia principle: when the glasses are in a relaxed state, parallel light enters the eyes and focuses in front of the retina, which results in the inability to form a clear image on the retina, which is called myopia.

Presbyopia, also known as presbyopia, is a normal physiological phenomenon. Unlike myopia, presbyopia is neither ametropia nor pathological condition. This is a physiological phenomenon and one of the signs of aging. In other words, presbyopia is an inevitable visual problem when people enter the middle and old age, which is unavoidable for anyone. Presbyopia principle: The occurrence and development of presbyopia are directly related to age, most of which occur after the age of 45. With the growth of age, the lens of the eye gradually becomes hard and thick, and the adjustment ability of the eye muscle also decreases, leading to the decrease of the zoom ability.

Myopia is mainly caused by the gradual decline of hyperopia, blurring of distant objects and normal near vision. However, high myopia is often caused by refractive interstitial opacity and retinal and choroidal degeneration. Its near and far vision is very poor, sometimes accompanied by a black shadow in front of you. The influence of presbyopia is concentrated nearby. When observing nearby objects, because the image cannot be fully focused when projected onto the retina, the nearby objects will become blurred, while when observing distant objects, the vision is normal.

When presbyopia appears, when they read small words, they will unconsciously move away, squint their eyes and enjoy the light. With the increase of presbyopia, you must rely on presbyopia to clearly see nearby objects. After many low myopia patients have presbyopia, they can take off their glasses when looking at close objects, which gives people the illusion that myopia will not cause presbyopia. In fact, this is only offset by the lens degree.

A So the elderly without myopia will have presbyopia. They don't need to wear presbyopia glasses when looking far, but they need to wear presbyopia glasses when looking near. B But people with myopia have presbyopia. Only when they watch closely can presbyopia counteract part of the degree of myopia, so they still cannot completely get rid of myopia glasses, and may even need to prepare two pairs of myopia glasses. For example, if you used to wear 600 degree myopia glasses, you may only need to wear 500 degree or 400 degree myopia glasses to watch closely when you are old, but when you look far, you still need to wear 600 degree myopia glasses. "The article comes from the network. If there is infringement or violation, please contact us to delete it

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