Interview Guest Yang, Director of Ophthalmology, Children's Hospital Affiliated to Capital Institute of Pediatrics
Yang: Orthokeratology is a kind of contact lens with rigidity and high oxygen permeability. Kind of like the soft contact lenses we adults wear. They are all worn on the cornea.
But its design is different, mainly an anti-geometric design. Adult contact lenses are matched with our cornea, and the degree is made on the glasses. For example, if you are 350 degrees, he will choose 350-degree soft contact lenses for you to wear. After wearing this mirror, you can see clearly. Corneal plastic mirror is not the principle. It is designed by reverse geometry, which is not completely matched with our cornea, but it has plastic effect. After shaping, I can see clearly by taking off my glasses, not when I put them on, but when I take them off.
Generally speaking, they are worn at night. Most products approved by FDA are pajamas. Then we are also using a plastic corneal mirror at night.
Children don't need to wear glasses during the day and wear this kind of corneal plastic lens at night. After one night, it may take 8 to 10 hours, and then they will take it off when they get up the next morning, so that his vision can be kept at 1.0 all day without wearing any other glasses. This is such a thing.
Its keratoplasty is gradually shaping, and finally it reaches his vision 1.0. Maybe, for example, the child has 300-degree myopia, so the naked eye vision may be 0.2 on the first day after wearing it, and 0.3 or 0.4 on the second day. It will gradually take shape in a few days and reach 1.0. Some children may take shape soon and reach 1.0 in a week, but it is not.
Brief introduction of column
"The topics you care about are answered by authoritative experts in the top three hospitals"-The Health Intelligence Bureau is a brand column of big health science exclusively produced by Guangming. Founded in June, 20 16, it won the "Healthy China" innovative communication column award of the National Health and Family Planning Commission, and was invited to become a member of "China Medical Media Alliance" and a brand column of Beijing Traditional Chinese Medicine Stereoscopic Communication Alliance.
Orthokeratology is a good choice for teenagers with developing eyes. On the one hand, orthokeratology can achieve the state of not wearing glasses during the day by wearing plasticity at night. On the other hand, orthokeratology does have a good effect in controlling the development of myopia.
Orthokeratology mirror, also often called OK lens, belongs to a kind of contact lens. It's just that the contact lenses we usually see are all made of soft materials. Corneal transplantation is a special RGP (high oxygen permeability rigid contact lens) lens with good oxygen permeability. Because it is hard, it can shape the cornea in a short time at night, and you don't need to wear glasses during the day. But also because it is a hard lens, the comfort will be a little worse. Generally speaking, it is effective in controlling the development of myopia, but the specific effects vary greatly among individuals and cannot be quantified at present.
However, on the one hand, orthokeratology lenses are expensive, and the cost of fitting them once ranges from thousands to tens of thousands. They need to be reinstalled every 65,438+0-2 years. On the other hand, there are risks of hypoxia and infection. Therefore, before fitting, you must be prepared to make a detailed examination of your eyes to determine whether the corneal morphology is normal, whether conjunctival inflammation and dry eye symptoms are serious, and whether the intraocular pressure is normal. Need a professional doctor to diagnose.
It is important to pay attention to regular review after fitting. On the first day, 7 days and 30 days after wearing the lens, it is necessary to check whether the lens is suitable, whether it is too loose or too tight, and then check it regularly every three months, mainly to check the corneal condition, vision and lens condition, so as to find the problem in time and deal with it.
OK lens is a specially designed contact lens imported from the United States. The reason why this lens is special is that it is not mainly worn during the day, but worn when sleeping at night. After getting up in the morning and taking off the lens, things will be clearer than before. At first, people invented this kind of lens to facilitate some people to see things clearly without wearing any glasses during the day, but later optometrists in many countries found it even more useful, that is, many nearsighted children can get a certain degree of control after wearing it and will not develop too much. The discovery of this result has attracted more and more people's attention, especially Asians. Because of the large population of myopia in Asia and the rapid development of myopia, many people want to wear OK glasses for their children because they are afraid of high myopia in the future. However, many people are not very clear about the working principle and effect of OK glasses and the precautions before and after wearing them. So the following content will explain the OK mirror in detail for you.
First of all, OK lens is a kind of contact lens with high oxygen permeability and reverse geometric design. Mainly used for wearing at night, to reduce myopia by flattening the cornea. The lower the degree of myopia, the less pressure is needed, and the easier it is to obtain good results. The less pressure on the cornea, the less possibility of injury. Generally, the lens pressure required for myopia within 600 degrees will not harm the cornea, and the pressure probability above 600 degrees will increase, but as long as other conditions are suitable, myopia patients above 600 degrees can also wear OK glasses.
Second, not everyone is suitable for wearing OK glasses. Everything is the same, even the best thing, if you are not suitable, then you must give up, otherwise it may be counterproductive. So before wearing OK glasses, do some tests to determine whether you can wear them. When someone tells you that you can definitely wear OK glasses without any inspection, you'd better leave quickly.
Third, if you want to wear OK glasses, please be sure to find a professional and experienced optometrist. Because they know how to make you wear OK glasses better, your eyes may be uncomfortable or even inflamed in the process of wearing OK glasses, so experienced optometrists can better find out the reasons and provide solutions, so that you can get the best results in the process of wearing OK glasses and keep your eyes healthy.
Fourth, if you want to wear OK glasses, you must form the habit of speaking hygiene. This lens is used to contact the eyes. The lens is not clean, and frequent contact with the eyes can easily damage the eyes. At the same time, the surrounding environment should be kept clean and hygienic. If you like swimming, don't wear goggles, your eyes often touch the pool water, or your eyes are easily exposed to other dirty things, then I suggest you don't wear them, which may easily cause eye inflammation or even infection.
Fifth, everyone wears OK glasses, but the effect is not necessarily the same. Because everyone's own conditions are different, some people's vision recovery will be better, some people will be worse, some people will have better myopia control, and some people will be worse. Just like people with the same disease take the same medicine, because the severity of the disease is different, some people will get better faster, while others will get better slowly or even have no effect. Everyone who wears OK glasses can see more clearly than before, but not everyone can control the development of myopia well, because there are many factors that affect the development of myopia, and OK glasses can't cover everything. Clinical research shows that a small number of people wear OK glasses, and the development speed of myopia is still faster, but it is still slower than the original speed, which may be caused by special carelessness with their eyes.
Sixth, regular review is very important. Regular review is an opportunity for you to communicate with optometrists. You can inform your optometrist of some problems found in the process of wearing OK glasses, and he can also find potential problems through some inspections and solve them, so that you can wear them better and safer.
There is an assistant doctor in our department. He is 22 years old. When he was in the fifth grade, he wore a plastic mirror. It's over 200 degrees now, and it hasn't changed much. And he used to wear it, and he has been wearing it since he became an adult.
Orthokeratology glasses can be worn to control the elongation speed of the eye axis.
However, it should be noted that there is no way to shorten the long axis length by wearing orthokeratology glasses.
At the same time, the orthokeratology lens passes through, and the external force presses the cornea, changing the shape and diopter of the cornea.
Any treatment may have side effects, and corneal punctate bleeding and conjunctival congestion may occur during orthokeratology. These situations are relatively easy to handle, and the specific reasons are also explained in my article.
Orthokeratology mirror, because it can't change the shape of cornea permanently, but only wears it at night to flatten the center of cornea, so it has the problem of rebound after stopping using it.
With the development of medical technology, there are more and more methods to treat myopia, and orthokeratology is a kind of contact lens that sounds amazing. Similar to the shape and wearing method of contact lenses. It corrects vision by gradually changing the curvature of cornea. Children only need to wear it at night and will return to normal vision during the day.
It sounds as if children can get rid of the frame mirror from now on, but parents need to be reminded that orthokeratology can only delay the decline of vision and deepen the degree, but it can't cure myopia, and the requirements for the wearer are higher.
Orthokeratology mirror is more suitable for people over 8 years old with myopia degree of 600 and astigmatism degree 150, especially for children with high myopia and rapid growth of myopia degree. Patients with eye diseases, such as trachoma, conjunctivitis, dry eye, chronic diseases, amblyopia, etc., are not suitable for wearing.
Orthokeratology is divided into two stages. In the first stage, you wear 8- 10 hours every night for about a month. When your vision is stable, you need to check it once a month until your vision is basically stable and no longer declines. Parents can choose to continue to wear orthokeratology glasses or frame glasses according to their children's actual situation.
Orthokeratology is an effective method to control the development of myopia at present, which can effectively slow down the decline of myopia vision and provide clear naked eye vision. It is a reversible operation not to wear frame glasses during the day. After wearing orthokeratology lens, the corneal morphology changes, which leads to the improvement of vision, and the vision will gradually decline after stopping using it. Orthokeratology mirror has advantages, but it also has disadvantages, such as high price, frequent nursing operation and reexamination, high hygiene requirements and more trouble than frame glasses. When choosing orthokeratology lenses, it is necessary to adopt individualized testing and matching methods. Some patients are not suitable to wear orthokeratology glasses, such as dry eye, thin cornea, corneal ulcer, keratitis and so on. If you choose orthokeratology mirror, you must listen to the doctor's review, examination and reasonable care. Orthokeratology requires high standards. For those with relatively good sanitary conditions, aseptic operation must be carried out to achieve a reasonable and effective application method to control the development of myopia, rather than wearing it by yourself. There is a certain time limit for wearing orthokeratology lenses, and it takes about one year to one and a half years to replace the products. Remind patients with orthokeratology to go to the hospital regularly to avoid the bad damage caused by orthokeratology.
My child is in the fourth grade, and there are some genetic factors. It's already 400 degrees, and it's gone up 100 degrees a year. I don't know if the ok mirror I just ordered in the 3A hospital has any effect. I can only say that parents try their best to provide the best for their children.
What is orthokeratology?
Orthokeratology is a new myopia correction method. As the name implies, wearing an orthokeratology lens can change the shape of the central surface of the cornea, thus changing the refractive power of the cornea. Moreover, the effect of orthokeratology is temporary and recoverable, and it is an effective reversible treatment method for removing myopia glasses without surgery.
How to use orthokeratology mirror
Orthokeratology is a special kind of contact lens, which is worn in a similar way to ordinary contact lenses. But the wearing time is different from ordinary contact lenses. Orthokeratology glasses only need to be worn at night, and the vision will be corrected to normal after being taken off during the day, without wearing frame glasses. Moreover, the material of orthokeratology lens has better oxygen permeability and is more comfortable to wear.
Who is orthokeratology mirror suitable for?
Orthokeratology mirror is suitable for myopia patients over 8 years old and below 600 degrees. At the same time, it can control and delay the deepening of myopia, especially for teenagers with rapid myopia deepening. At the same time, the orthokeratology mirror has certain fitting requirements, so it must be checked and confirmed that the eye conditions are suitable before fitting.