"First, if you are not careful, the corneal plastic mirror will make the cornea inflamed, perforated and blind."
First of all, as a professional academic report of medical science, it is really surprising that "American experts" use the word "carelessness" as a prerequisite for serious consequences. Secondly, washing your face with tap water and swimming in the wild may cause keratitis. There are many kinds of keratitis, and not every kind of keratitis is incurable.
Orthokeratology needs to be used under the guidance of a doctor. In the clinical practice of Guangzhou Sun Yat-sen University of Medical Sciences, Peking Union Medical College Hospital and Hong Kong Polytechnic 1998 to 20 12, there were no cases of severe keratitis or "blindness" caused by using orthokeratology glasses.
Parents can refer to Basic Ophthalmology published by People's Health Publishing House (black cover, the original name of the book is Basic Ophthalmology and XXX).
"Second," lack of oxygen ". The result is "dry eye". General "dry eye" is formed in 1-2 years. "
"Hypoxia" should refer to corneal hypoxia. The most likely consequence of corneal hypoxia is corneal edema, and some people's vision in the morning is not as good as that in the afternoon. Just because the upper and lower eyelids are closed when sleeping at night, slight corneal hypoxia causes corneal edema. There is no hypoxia after opening eyes during the day, edema disappears slowly in the afternoon, and vision gradually recovers. Because corneal oxygen comes from tears, dry eye may lead to corneal hypoxia, but it is by no means corneal hypoxia that leads to dry eye. In addition, tears are secreted by lacrimal glands, and orthokeratology glasses are worn on the cornea, which has nothing to do with lacrimal glands.
Symptoms of corneal hypoxia can also refer to the second edition of Practical Ophthalmology published by People's Health Publishing House.
"Third, the center of cornea becomes thinner; Corneal thinning is one of the main causes of keratoconus (commonly known as exophthalmos).
First of all, the commonly known "exophthalmos" refers to the increase of intraocular pressure caused by hyperthyroidism, which leads to exophthalmos. Secondly, the most effective way to treat keratoconus is to wear hard contact lenses, and orthokeratology is one of them. This is really a blow to the "netizens" who forwarded this article.
Reference: Chinese Ophthalmology published by People's Medical Publishing House (two volumes, red cover)
"Fourth, the cornea is deformed due to curvature (the center of the cornea is thin and the periphery is relatively high). The result is irregular astigmatism and irregular ghost; Irregular ghosting is not cured! "
The principle of orthokeratology and corneal laser surgery is to correct vision by changing corneal curvature. If your corneal curvature is permanently and systematically reduced, congratulations, your myopia is gone. Irregular astigmatism can be found in medical books. As for the "irregular ghost", I have never heard of it, and there is really no answer to how to cure it.
The words in brackets in this article can be traced back. "The center of the cornea becomes thinner and the periphery is relatively high." The accurate statement is that corneal epithelial cells in the pupil area move and recombine to the periphery. So as to form a defocus effect on the retina, lead to the lengthening of the cut-off eye axis and control the growth of myopia.
Reference: 20 12 Ophthalmology Phase VI and Practical Orthokeratology written by Xie Peiying, a professor of optometry at Peking University.
"Fifth, other unpredictable eye syndrome."
The meaning of this sentence seems to mean that all unexpected, unheard of and indeed inevitable ophthalmic diseases of the author of this article are caused by orthokeratology. I have no reference to this sentence, please forgive me!
Is orthokeratology dangerous?
1998 to 2000, some unprofessional institutions, such as optical shops, sold a large number of OK glasses. There are also numerous manufacturers of fake and shoddy OK mirrors in China. No patient screening, no fitting process, no review, no patient training. Pay like ordinary contact lenses! Take it away! More than100000 people in China use orthokeratology and are infected with dozens of cases of Miba virus. Its danger is equivalent to taking penicillin without skin test. It is this incident that makes OK Mirror bear the blame of Chinese greed. It is understandable that some victims' families are still promoting the harm of OK mirrors. This situation is similar to the tragedy caused by penicillin allergy. Family members come forward to inform the harm of penicillin and prevent other patients from using penicillin.
Children are nearsighted, how do parents choose?
There is no cure for myopia in teenagers in modern ophthalmology (you can only see strange cure for myopia in advertisements). Once a child suffers from myopia, parents must first accept the reality. The measures that can be taken are how to prevent myopia from deepening at a faster speed. I hope parents don't seek answers online, but ask an ophthalmologist for help.
About progressive films: Basic Ophthalmology published by People's Medical Publishing House is very clear. The original words are as follows: "Progressive multifocal frame glasses have been reported to control myopia, but according to the control experiment of children aged 6 to 8 in Hong Kong Polytechnic University, there is no obvious difference in the rate of myopia deepening between the group wearing ordinary glasses and the group wearing progressive film, which cannot prove that progressive multifocal lenses have practical significance in controlling myopia." Most businesses will carefully design marketing methods to deal with anxious parents, so we must be calm at this time. At least ask about corrective measures, medical names, etc. Please believe that if you can really cure myopia, the first one to use is the hospital!
About orthokeratology: the annual length of wearing ordinary glasses is between 67 degrees and 78 degrees (the former is the statistics of Peking University and the latter is the statistics of Hong Kong Polytechnic University, both of which are statistically significant), and the annual length of wearing orthokeratology glasses is between 8 and 16 degrees. That is to say, if a child aged 10 is 100 degrees, wearing ordinary glasses will increase by 67 degrees every year, and the degree will increase to 636 degrees when he is 18 years old; Wearing orthokeratology glasses until 18 years old will increase 16 degrees every year, and the degree will increase to 228 degrees. How to choose is a simple arithmetic problem. However, attention should be paid to the selection of fitting institutions. If you choose a big hospital, the problem is not big, just queue up for registration, and the audit will be more troublesome. If you choose a private fitting agency, you must first have a medical device business license issued by the state. If the certificate is issued by an association you haven't heard of, turn around and leave. Secondly, it is more important to see whether the fitting institution has a licensed ophthalmologist. Even if you have a certificate, you should be able to see the ophthalmologist himself, and some are borrowed certificates. If the private sector has the above two points, let's see if they have other corrective methods to cooperate with orthokeratology. If there is, turn around and go, because there is no other correction method written in the textbook. If he tells you that you have lost your myopia after wearing it for two years, you can turn around and leave. It is very important to choose an institution that has relevant certificates and can objectively introduce the integrity of orthokeratology. Integrity can guarantee quality.