The corneal shaping lens originated in the United States. After 50 years of development, it has been applied in 34 countries around the world; It is a corneal shaping lens designed with a special inverse geometric shape, and its inner surface is composed of multiple arcs. The lens and tear layer are unevenly distributed, and the resulting hydrodynamic effect changes the geometric shape of the cornea.
Preparation before mirror
1. Cut long nails.
2. Put a filter screen at the water outlet of the wash basin to prevent the lens from being washed away by water.
3. Wash your hands with soap for three times, especially the fingers contacting the lens.
4. Place a clean towel in front of the mirror on the operating table.
5. Open the lens box.
Method of Wearing Mirror I
Place the inner curved surface of the lens upward on the tip of the index finger of the right hand, drop a drop of lubricant on the concave surface of the lens, fix the wearer's eyes in front of them, pull the upper eyelid with the index finger of the left hand, and fix it on the eyebrow arch, pull the lower eyelid with the middle finger of the right hand, gently place the lens in the center of the cornea, first loosen the lower eyelid, then loosen the upper eyelid, blink gently, and face the mirror to ensure that the lens is worn on the cornea.
Open the eyelids with the index finger and thumb of the hand wearing the mirror. The finger position should be as close to the eyelid edge as possible. Place the lens on the index finger tip of the other hand. Gently wear the lens in the center of the cornea. First release the lower eyelid, then release the upper eyelid, blink gently, and face the mirror to ensure that the lens is worn on the cornea. [2]
Note: A mirror can be placed in front of your eyes. When wearing a mirror, you should open your eyes at the same time to let your eyes fix on one part of the mirror. When wearing a mirror, you should control the rotation of your eyes. In addition, you should ensure that the lens is placed securely on the cornea before slowly releasing the finger that pulls the eyelid. If you release it too early, the lens may shift or fall off. In addition, lenses must be soaked for more than 4 hours before wearing.
Corneal shaping lens is a special RGP lens. Ordinary RGP lenses are used to correct vision, while plastic lenses are used for "correction", that is, to improve vision by changing the shape of the cornea assembly. The inner surface of the "corrected" RGP lens is parallel to the surface of the cornea and coincides with each other. The brightness of the lens is adjusted by changing the outer surface of the lens. The plastic mirror used for "orthopedics" is the opposite. Its external surface is relatively simple, and its internal surface is relatively complex. The inner surface of the plastic lens is no longer parallel or anastomosed with the cornea, but creates some gaps between the lenses and corneas, and uses the role of tears to achieve the "orthopedic" effect.
The corneal shaping lens has experienced four generations of design, and the first three generations are no longer suitable for the needs of modern people. The latest generation of design belongs to the fourth generation, and its therapeutic effect is much faster than before, so it is also called "rapid shaping method". The patient has a very significant correction effect after wearing it overnight, and the subsequent treatment period is 10-30 days, to achieve the final treatment effect.
The modern corneal shaping lens adopts a four zone design. The four areas are: Base arc Area, also known as central optical area or treatment area; Reverse arc area; Positioning arc area, also called matching arc area; And the surrounding arc area. On February 13, 2008, China's State Food and Drug Administration approved the first domestic enterprise to produce plastic mirrors, and further standardized its use of refractive range and various parameters.
