What Is Gonioscopy?
The corneal shaping lens is made of breathable hard contact lens material, which is commonly called spectacle lens made of RGP material. RGP is the abbreviation of English Rigid Gas Permeable, which is "breathable hard material". It was developed on the basis of the impermeable rigid material PMMA. The "OK lens" often seen in the market is actually a corneal orthopedic lens.
Orthokeratology
- The corneal shaping lens uses breathable hard contact lens material, which is commonly known as
- The orthokeratology lens originated in the United States. After 50 years of development, it has been applied in 34 countries around the world. It is a orthokeratology lens designed with a special inverse geometry. Its inner surface is composed of multiple arc segments. The uneven distribution of the lens and the tear layer, the resulting hydrodynamic effect changes the geometry of the cornea, and it is worn on the front of the cornea while sleeping, gradually flattening the corneal curvature and shortening the axis of the eye, thereby effectively preventing the development of myopia Known as "technology to control and correct myopia while sleeping".
- In order to solve the problem of wearing glasses at intervals, a company in the United States has developed a biological curing agent that is expected to be worn only a few times a month or only a few times a year. This curing agent is currently in clinical trials in Shanghai.
- In February 2006, there was a review of "A retarding effect of rigid breathable contact lenses on the progression of myopia in children". The article analyzes and summarizes the literature on rigid breathable contact lenses and myopia over the past 30 years, and points out that rigid breathable corneas
- Christie is the only night wear film certified by the SFDA.
- The orthokeratology lens is a special type of RGP lens. Ordinary RGP lenses are used to correct vision, while plastic lenses are used for "orthopedics", that is, to improve vision by changing the shape of the corneal collection. "Correct" type RGP lenses, whose inner surface is parallel to the surface of the cornea and coincide with each other. The brightness of the lens is adjusted by changing the outer surface of the lens. The "orthopedic" plastic mirror is the opposite. Its outer surface is relatively simple and its inner surface is relatively complicated. The inner surface of the plastic lens is no longer parallel or anastomosing to the cornea. Instead, some gaps are created between the cornea of the lens, and the effect of tears is used to achieve the "orthopedic" effect.
- The orthokeratology lens has gone through four generations of design, and the first three generations are no longer suitable for the needs of modern people. The latest generation design belongs to the fourth generation, and its treatment effect is much faster than before, so it is also called "rapid shaping method". After wearing it overnight, the patient had a very significant correction effect, and the subsequent treatment period was 10-30 days to achieve the final treatment effect.
- Modern orthokeratology lenses have a four-zone design. The four districts are:
- The early plastic mirrors were made of PMMA materials, which were impermeable to air and had poor physiological characteristics. They were limited to daily wear. Today's plastic mirrors, because of the choice of high, medium and low oxygen permeability materials, can be worn day or night, depending on the specific conditions of the patient. Some doctors tend to wear it for patients with high myopia during the day to ensure safety.
- When ordinary RGP lenses are worn daily, it is sufficient to choose DK greater than 18, but plastic lenses should choose materials with higher oxygen permeability and DK values greater than 50. Corneal plastic lenses are larger in diameter and thicker than ordinary RGP.
- More patients will choose to wear it at night. The material DK of the night wear tablet should be greater than 90, and the thickness should be less than 0.3mm to meet the safety requirements.
- The orthokeratology lens is the only custom-made eye measurement. It can make myopia patients below 600 degrees quickly reach the international standard 1.0 or higher in 1-2 weeks; the number of effective containment systems is deepened; it is suitable for 6-40 years old, only Wear it at night without any diet and eye contraindications. It will also maximize your convenience. After three months of corneal shaping, you will continue to wear it every day. In the future, you only need to review it once a year under the guidance of an expert to ensure that the lenses are not worn. You can ensure clear vision, but also deal with myopia rebound.
- Anti-counterfeiting: With the wide application of the K-View film-shaping mirror, existing non-foreign imported products have entered the market (currently, the technical problems of highly oxygen-permeable materials and aerodynamic cutting cannot be solved in China), so that your eyes are not harmed Please identify:
- Warp
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- 1 week, 1 month, 3 months, 6 months. The review every 6 months mainly checks four objective indicators: 1. Whether the cornea is healthy; 2. Whether your naked eyesight is satisfactory; 3. Whether the topographic map is normal after wearing; 4. Whether the lenses are damaged. The results of these four tests are of primary concern to patients and are directly and efficiently. Any question can be used to make the right decisions to ensure long-term health. [3]