Myopia when young, not presbyopic when old? Dear young and middle-aged friends who suffer from myopia, the truth may disappoint you a little. Because whether it is a person with normal vision or a nearsighted person, they will get presbyopia when they get old. So, can myopia offset some degree of presbyopia? Let’s take a look.
The causes of myopia and presbyopia are different. Myopia is the refractive error of the eye caused by various reasons, and it is not clear to see distant objects. Presbyopia is the physiological visual degradation that occurs with human aging, and it is not clear to see near objects.
When people with myopia wear reading glasses, they will offset some degrees of hyperopia due to myopia, making their presbyopia less serious, but it does not mean that they do not need to wear reading glasses, and usually highly myopic people need to carry two pairs of glasses with them after they have “presbyopia”.
Presbyopia usually appears at the age of 42-45, and the initial degree is usually 50-100 degrees. With age, the degree of presbyopia is slowly deepening, generally increasing by 25 to 50 degrees every five years. After the age of 65, the adjustment power of the eye lens and ciliary muscle is completely lost, and the degree of presbyopia will stabilize at about 300 degrees. Experts remind that presbyopia should go to the ophthalmology department for vision examination to judge whether it is necessary to wear reading glasses at present. Some old people have presbyopia and cataract at the same time, and they need to go to a specialist for examination. After wearing glasses, check your eyesight every 3 to 5 years, and adjust the degree of presbyopic glasses.
Do not avoid presbyopia, wear reading glasses if necessary
People in their 40s and 50s who have just developed presbyopia, because they are still at work, feel that wearing presbyopic glasses means they are old, so they are very resistant. Don’t avoid presbyopia, not wearing reading glasses will only damage your eyesight more. Discomfort such as eye pain, fatigue, and headaches may occur when looking at close objects.
Especially for “young presbyopia” in their 40s and 50s, if they often watch computers and work at desks, not wearing reading glasses will lead to more serious visual fatigue and aggravate the loss of ciliary muscle adjustment.
Experts remind that considering the offsetting factors, myopia with less than 300 degrees generally do not need reading glasses to see near objects, just take off the myopia glasses. When highly myopic eyes see near, they still need to switch to a pair of myopic glasses that subtract the degree of presbyopia and have a shallower degree, otherwise it will affect seeing near objects. For example, a 65-year-old man with a myopia of 800 degrees needs to change to a 500-degree myopia glasses when looking at near, and wear the original myopia glasses when looking at a distance.
Pay attention to these misunderstandings of presbyopia
Myth 1: Buying a pair of reading glasses at random
It is difficult to buy reading glasses with a fixed prescription and fixed interpupillary distance on the street. It is difficult to match the actual prescription, interpupillary distance, face shape, and brain shape of the wearer. Not only cannot the patient’s vision achieve the best effect, but it will cause visual interference and visual fatigue. Therefore, the purchase of reading glasses should vary from person to person, and you must go to a hospital or professional institution for fitting.
Myth 2: Wear a pair of reading glasses to the end
Wearing a pair of presbyopic glasses for a long time, when the lens is scratched or aged, it will cause a decrease in light transmission, affect the image quality of the lens, and accelerate eye presbyopia. In addition, patients should regularly review their eyesight, adjust their frames, replace their lenses in a timely manner, and re-examine their optometry and glasses every 5 years. Otherwise, wearing inappropriate glasses will only backfire, and even cover up some eye diseases, such as cataracts and the manifestations of diabetes in the eyes.
Myth 3: Magnifying glasses instead of reading glasses
A magnifying glass replaces reading glasses, which is equivalent to 1000-2000 degrees when converted into reading glasses. If you “indulge” your eyes in this way for a long time, it will be difficult to find the right degree when you add reading glasses.
Myth 4: Multiple people share a pair of reading glasses
When husband and wife share a pair of reading glasses, one party must accommodate the other. The result of accommodation is that the vision is getting worse and worse, the degree of “presbyopia” rises rapidly, and it becomes more and more difficult to see things.
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Post time: Jul-24-2023