Central Broadcasting Network Beijing, February 25th news According to the “News Hyperlink” of the Voice of China, China Central Radio and Television Station, the General Office of the Ministry of Education, the General Office of the National Health and Health Commission, and the State Administration for Market Regulation The General Office recently issued the “Notice on Further Regulating Campus Vision Testing and Myopia Prevention and Control-related Services” (hereinafter referred to as the “Notice”), proposing to crack down on false and illegal marketing and publicity. The “Notice” makes it clear that under the current medical technology conditions, myopia cannot be cured, and local market supervision departments should strictly investigate and punish the use of “rehabilitation”, “recovery”, “reduction of degree”, “myopia cure”, “myopia nemesis” and “degree repair” according to law. ” and other misleading representations of marketing and promotion of myopia prevention and control products for children and adolescents.
Recently, there are media reports that with the start of the new semester, the ophthalmology clinics of many hospitals have become “check-in places” for students and parents. In addition to optometry, the department for fitting orthokeratology lenses, also known as “OK lenses”, is also hard to find.
The price of orthokeratology lenses is generally tens of thousands of yuan, and they need to be replaced every year to one and a half years. In daily use, care solution is also required. The price is not low, and there are many requirements in use, but these can’t stop the hearts that don’t want to wear myopia glasses anymore. However, experts also said that the “OK mirror” is not “all OK” for all myopic teenagers.
What kind of situation is suitable for using orthokeratology lens? Can it treat myopia? What should children and adolescents pay attention to to prevent myopia?
Prevents from deepening rather than cures myopia
When I saw the words “Keratoplasty”, my eyes seemed to tense unconsciously.
To achieve the purpose of “shaping”, it is necessary to put a certain amount of pressure on the cornea and use an orthokeratology lens to change the shape of the cornea, but this will not change the structure of the cornea.
Tao Ye, deputy director of Beijing Ming Optometry and Eye Surgery Center, introduced that the compression effect flattens the central area of the cornea, which can slow down the growth of the eye axis, thereby correcting vision: “The elasticity of the cornea is not the same as other tissues. After it is flattened, it has a relatively slow time course to gradually return to its original natural shape.”
This also means that the effects of wearing orthokeratology lenses are only temporary.
Its wear and tear is similar to contact lenses, however, the time of use is different. Usually, myopic patients wear orthokeratology lenses at night, take them off when they wake up, and can get clear vision during the day. After stopping use, the vision will return to the previous degree. Therefore, it is used to control the further progression of myopia, not to cure myopia.
Tao Ye pointed out that being able to see things clearly after a reasonable correction can give the brain a positive feedback – the eyes are now in good condition and no other changes are needed: “This will help control the development of myopia. In addition, , At present, the vast majority of myopia is axial myopia – the length of the eyeball is constantly elongated, causing myopia. After using orthokeratology lens, it can cause the peripheral retina to show a myopic defocus state, relieve the degree of axial growth, and give the retina an inducement .”
Not “OK” for everyone
Possible adverse reactions when wearing contact lenses, using orthokeratology It can also occur while wearing lenses, for example, from eye infections caused by improper lens care. However, unlike ordinary contact lenses, orthokeratology lenses use high-permeability and oxygen-permeable polymer materials that can be worn at night.
Orthokeratology lenses sound similar to daily contact lenses, but they are medical devices that need to be fitted in medical institutions. Before fitting an orthokeratology lens, a strict, meticulous and comprehensive eye examination must be carried out to exclude contraindications to wearing it, and tailor-made according to various parameters of the individual eye to ensure the safety and effect of use.
Feng Xueliang, chief physician of Shanxi Provincial Eye Hospital, said that not all children and adolescents are suitable for wearing orthokeratology lenses: “Because it has a range of correction degrees, usually more than 400 degrees, the correction effect is not good. Well, some brands can correct 600 degrees. In addition, myopic eye diseases, allergies, or eye shape can affect whether they can wear orthokeratology lenses.”
Adults still have time to use them. Orthokeratology?
In this regard, Tao Ye said that it is basically effective for adults to temporarily correct vision, but because the corneal elasticity of adults is smaller than that of children and adolescents, the effect is weaker. At the same time, he emphasized that the main purpose of children and adolescents using orthokeratology lenses is to control the deepening of myopia, not just to solve vision problems.
Eating sweets also affects vision
The latest data shows that the overall myopia rate of children and adolescents in my country is 53.6%. Among them, 14.5% of 6-year-old children, 36% of primary school students, 71.6% of junior high school students, and 81% of high school students.
The “Notice on Further Standardizing Campus Vision Testing and Myopia Prevention and Control Services” pointed out that under the current medical technology conditions, myopia cannot be cured. In this way, Tao Ye pointed out that it is possible to prevent or prevent the development of myopia only if the eye habits are improved.
He suggested that children and adolescents should not use their eyes at close range for a long time, and should adjust “seeing far and near” for about 20 minutes to relax their eyes. At the same time, do outdoor activities to get in touch with natural light.
In addition, Tao Ye also pointed out that eating sweets will make the sclera saccharification and soften the eyeball, which makes it easier to deform and elongate. Therefore, it is recommended that children and adolescents eat less sweets.