OK lens (corneal shaping lens), control myopia, OK?

Abstract: orthokeratology is usually called OK lens. It is a hard and breathable corneal contact lens with unique design. It is worn in front of the cornea at night to change the shape of the corneal surface, so as to reduce myopia.

In recent years, more and more teenagers have joined the ranks of myopia. People have shown great enthusiasm and concern about how to prevent and treat myopia. Corneal shaping technology, as one of the effective methods to control myopia, has been understood and accepted by more and more students’ parents. So what’s the matter with corneal plastic lens?

what is a keratoscope?

corneal shaping lens Orthokeratology, commonly known as OK lens, is a hard and breathable corneal contact lens with unique design. It is worn in front of the cornea at night to change the shape of the corneal surface, so as to reduce myopia. After taking off the lens the next day, the patient can see clearly without glasses. It is an internationally recognized method with the best effect on controlling juvenile myopia.

What is the function principle of corneal plastic mirror?

from the design of corneal shaping lens, the base arc in the center of the lens is flatter than that in the center of the cornea. When the corneal shaping lens is worn on the corneal surface, there are a variety of forces acting on the cornea: ⑴ the lens produces a certain amount of mechanical compression on the cornea to flatten the center of the corneal membrane; ⑵ the pressure of the tear layer between the lens and the cornea on the cornea flattens the center of the cornea; (3) when the eyelid is closed, a continuous pressure generated by the eyelid on the shaping mirror flattens the center of the cornea; (4) from the change of corneal epithelium, during the wearing of shaping lens, the thickness of corneal epithelial cells becomes thinner and the width increases, and the central corneal epithelium moves to the periphery, which also flattens the central cornea. However, the total amount of corneal epithelial cells is constant, and the biological intensity of cornea is also constant. What is the role of

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corneal shaping mirror?

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corneal shaping lenses have two major functions: ⑴ they can effectively slow down the increase of myopia, delay the growth of ocular axis and reduce the incidence of fundus lesions in high myopia. (2) no glasses are required during the day, and the naked eye vision is improved.

is it safe to wear corneal shaping glasses?

corneal shaping technology has been widely used in European and American countries for decades. At present, China’s drug and Food Safety Supervision Bureau (SFDA) has approved the introduction of production and has been used clinically in well-known ophthalmic hospitals in China. In recent years, tens of thousands of patients with myopia have successfully worn it with high safety. However, after all, corneal shaping glasses are worn in the eyes during sleep. The detailed eye examination before fitting and the publicity and education to patients and parents, the guidance in wearing and regular review after lens fitting are indispensable. In short, in professional people It is safe to wear the corneal shaping lens under the guidance of the operator. Can

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corneal shaping lenses completely cure myopia?

at present, there is no medical means to completely cure myopia. Corneal plastic lens only temporarily changes the refractive state of the patient’s cornea. Its main function is to delay the deepening of myopia. The nature of the patient’s original refractive state will not change. Will

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leave sequelae after wearing corneal shaping mirror-

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during the wearing of corneal shaping lens, the lens only temporarily reshapes the cornea and is reversible, so there are few sequelae- Is it easy to wear

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corneal shaping glasses-

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corneal shaping lenses have good formability and do not need to distinguish between front and back. The fitting technician will train how to wear and care, and can wear them in about 5 minutes after proficiency-

is it suitable for anyone to wear corneal shaping glasses?

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are not suitable for everyone. Adapt to people with low myopia and astigmatism, and meet the data requirements of other ophthalmology disciplines such as intraocular pressure, corneal curvature and tear secretion. Is there an age limit for fitting

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corneal plastic lenses?

because the corneal shaping lens is worn on the corneal surface, the patient must have certain self-protection ability and certain cooperation ability. Therefore, it is recommended that the patients with myopia over 8 years old can customize and wear the corneal shaping lens after meeting various eye examinations and matching successfully. Does

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have side effects when wearing corneal shaping glasses?

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corneal shaping lenses essentially belong to contact lenses. In theory, there will still be contact lens complications, such as corneal infection, corneal epithelial punctate exfoliation, conjunctival congestion, infection and other common complications. Therefore, patients and their parents are required to wear them in a standardized manner, and strict lens care is required to minimize the possibility of complications. Once these complications occur, stop wearing plastic glasses immediately, go to qualified hospitals as soon as possible, and actively cooperate with doctors for treatment, which can generally recover.

what is the effect of wearing shaping glasses? Most patients with

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have significantly improved their naked visual acuity a few days after wearing, and their visual acuity can reach the best correction effect within one to two months. However, the corneal shaping effect varies from person to person and from the degree of myopia. Low myopia generally achieves satisfactory results in about a week; Moderate myopia may take 2 ~ 4 weeks to achieve satisfactory results. However, because the correction effect of plastic mirror is temporary and reversible, it needs to be worn every night in order to get long-term clear vision. Does

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corneal shaping lens have long-term therapeutic effect?

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corneal shaping lenses have two functions. The first is that the vision becomes clear after wearing. This function is temporary. You need to wear them every night to get clear vision the next day. If you stop wearing it, your eyesight will gradually decline; The second function is to control the deepening of myopia. This effect is permanent. If you wear it for two years, the deepening of myopia slows down. Even if you stop wearing plastic glasses in the future, the previously controlled degree will not increase significantly.