Ophthalmology Professor analyzes the “six monsters” of myopia

Abstract: myopia does not happen “suddenly” overnight. The reason why parents have “late awareness” of their children’s myopia is mainly because most parents do not have the awareness to take their children to the hospital for eye examination regularly, so that they can’t find their children’s vision problems early.

strange phenomenon 1: people who should wear glasses don’t wear

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. Many parents don’t want to wear glasses for myopic children too early. They think that wearing glasses will deepen the degree of myopia. Once they wear glasses, they can’t take them off again. If they can’t wear them, they should try not to wear them.

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comments: if myopia patients wear glasses unreasonably, it will cause two consequences: first, they are prone to visual fatigue and affect their study; Second, patients are often forced to squint to see things in order to make their vision clearer. The upper and lower eyelids compress the eyeball for a long time, which will lengthen the anterior and posterior diameter of the eyeball and increase the degree of myopia. It can be said that wearing glasses will not deepen myopia, but can slow down the deepening of myopia. The reason why some children have deepened myopia after wearing glasses is mainly related to their failure to pay attention to eye hygiene and poor reading habits, which is not directly related to wearing glasses.

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countermeasures: for adolescent patients with a certain degree of myopia, timely wearing appropriate glasses is an effective means to reduce visual fatigue and reduce the deepening of myopia. In addition, patients should also pay attention to eye hygiene and improve reading habits, and strengthen prevention and health care.

strange phenomenon 2: people who shouldn’t wear glasses wear glasses.

a 3-year-old child checked his eyesight in the kindergarten. The teacher found that his eyesight was only o.6, so he informed his parents that the child might be amblyopia and went to the hospital for examination. At the hospital, after mydriasis optometry, the doctor found that the child has a 200 degree hyperopia eye, so he equipped the child with a pair of 200 degree hyperopia glasses…

comments: after birth, the eye will grow proportionally with the organs of the body. At birth, the transverse diameter of the eyeball is not different from that of adults, However, the longitudinal diameter (ocular axis) is very short. The ocular axis of newborns is only 16mm, and that of children aged 3 is 19.5mm. In other words, children are hyperopia (the eye axis is short, and the images of external objects focus on the back of the fundus macula). With the increase of age, the eye axis gradually lengthens, and the refractive state gradually develops towards facing the eyes. Unfortunately, most parents, optometrists and even ophthalmologists in many hospitals do not understand this knowledge, and blindly match glasses to children with normal vision. Unexpectedly, 3-year-old children originally It should be 200 degree hyperopia. It is obviously a normal eye, but I wear hyperopia glasses. Isn’t this pushing the child in the direction of myopia?

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countermeasures: in view of the current uneven qualifications of optometrists in China and the lack of necessary optometry knowledge of many practitioners, parents may wish to take their children to large and specialized hospitals with strong comprehensive strength and excellent medical quality in order to avoid wrong glasses and endangering vision.

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strange phenomenon 3: “myopia”, I thought of “prevention”,

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. At present, there is a common situation in China: either engage in national prevention aimlessly, or wait until it is found that children have become myopia, and then think of prevention. In the clinic, many parents complained to the doctor, “doctor, our children’s eyesight has always been very good. Why are they suddenly short-sighted?”

comments: myopia does not happen “suddenly” overnight. The reason why parents have “late awareness” of their children’s myopia is mainly because most parents do not have the awareness to take their children to the hospital for eye examination regularly, so that they can’t find their children’s vision problems early.

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countermeasures: ask parents to establish a refractive development file for their children. The specific method is to go to the hospital ophthalmology every 6 months for mydriatic optometry and eye examination from a 3-year-old child. Record the diopter, axial length, corneal curvature radius, intraocular pressure, height, weight and other values. The establishment of refractive development files has three advantages: first, it can early detect abnormal refractive errors, such as high hyperopia, myopia, astigmatism and amblyopia, and second, it can early detect whether infants have eye diseases; Three can screen out the “blank” of myopia among children with normal vision. For example, 8-year-old children should have 125 ~ 150 degrees of hyperopia, with a visual acuity of 1.0. If the refractive state of an 8-year-old child is 75 degree hyperopia or emmetropia, it shows that the child has a high probability of becoming myopia in the future. Intervention measures must be taken in time to prevent the occurrence of myopia. Warm tips of

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: children need mydriatic optometry because of their strong eye regulation. Many parents have doubts about mydriatic optometry for fear that drugs will hurt their children’s delicate eyes. In fact, the drugs used in mydriatic optometry are not harmful to the eyes, and some are even drugs for myopia. Strange phenomenon 4 of

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: it is easy to match the glasses diagram. The myopia glasses of “gross estimation”,

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in optometry should be shallow and the hyperopia glasses should be deep; Computer optometry is fast and accurate, and manual optometry can be saved; Optometry and glasses matching is a trivial matter. Why bother to go to the hospital or regular glasses shop; It doesn’t matter if there is a slight error in optometry…

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comments: These are wrong optometry and glasses matching ideas. Misled by these ideas, many people wear inappropriate glasses, which is not only prone to visual fatigue, but also accelerate the deepening and development of myopia. In 1977, the animal model of “form deprivation” myopia was made. Researchers sutured the eyelid of a monkey to partially block the light entering the eye. After 6 months, when the sutured eyelid was opened, myopia occurred in the eye, while the opposite eye was normal. In 1983, the animal model of “optical defocusing” myopia was made. Researchers put 500 degree myopia lenses on one eye of monkeys to move the form focus into that eye back, and the other eye was used as a control. Half a year later, the eyes with lenses became 480 degree myopia, which was similar to the degree of lenses, while the opposite eyes were normal. Incorrect optometry and glasses will make external objects unable to form a clear image in the macular region of the fundus. Just like the above two animal models, it is equivalent to artificially “creating” myopia.

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countermeasures: vigorously promote medical optometry. As we all know, optometry is mainly to check the refractive state of monocular. Wearing glasses is to see the same object with both eyes, and you must get the best result